By aspect — in detail
Keybed
Strong consensus · 8 srcThe strongest point of agreement. The 49-key semi-weighted Fatar keybed — with polyphonic aftertouch as standard — is praised across editorial and owner sources as expressive, responsive and premium, among the best keybeds on a controller at this level. Poly aftertouch draws the most discussion: reviewers find it genuinely usable (an improvement on the old mono aftertouch) if not as deep as a dedicated expressive controller. The only caveats are that it's essentially the same Fatar action as the MK2 with a poly-aftertouch sensor added (a value point, not a quality one), and a few owners report plastic key noise developing over long-term use.
“The semi-weighted keys of the S61 and S49 are also excellent.”
Higher Hz
“The Kontrol S-Series MK3 is a wonderfully playable and tactile controller, its keybed responsive and nuanced and its hardware providing unparalleled direct control of instruments.”
MusicTech
“The keybed feels great and can pretty easily map knobs for non-NKS instruments if you want to.”
u/jgremlin_ · r/NativeInstruments
Measured
NI's spec: Kontrol S49 has 49 semi-weighted keys in an industry-leading Fatar keybed with polyphonic aftertouch as standard (the S61 shares this action; the S88 is fully weighted hammer-action). Owners note it is essentially the same Fatar keybed as the MK2 with a poly-aftertouch sensor added.
Controls
Contested · 8 srcThe most divided axis. NI stripped the control surface down to eight touch-sensitive encoders, a 4D navigation/push encoder, RGB pitch and mod wheels and a relocated touch strip, all under a large glass screen — and cut the MK2's button count (roughly 31 down to 21), dropping dedicated Solo/Mute/Scene/Pattern/Track buttons. Editorial reviewers largely accept and even praise this 'less-is-more' design, arguing the big screen and 4D encoder replace the need for banks of buttons. A large camp of buyers disagrees: they want faders, more knobs and drum pads (there are none), miss the dedicated buttons, and note the endless encoders have no detents. Reviewers also flag that orchestral/expression work benefits from faders the S-Series simply doesn't have.
Measured
NI's spec: 8 touch-sensitive rotary encoders plus a 4D push encoder under a 1280×480 glass colour screen, RGB-illuminated pitch and mod wheels, a bidirectional touch strip, and Light Guide RGB key lighting. There are no faders and no drum pads; per FutureMusic the button count dropped from 31 on the MK2 to 21 on the MK3.
Where it splits
The streamlined 'less-is-more' surface works — big screen, 8 encoders and a 4D encoder replace banks of buttons55%
“Assignable controls often make or break a MIDI controller, but in this case, Native Instruments has gone for the less-is-more approach, and it works.”
Higher Hz
Too few physical controls — no faders, no pads, only eight knobs, and the MK2's dedicated buttons are gone45%
“no faders, extra knobs, and pads. They could make a great midi controller if they added those features.”
3ptguitarist · Gearspace
Integration
Moderate · 9 srcThe headline feature, and mostly a strength. NKS 2 lets you browse, auto-map and tweak NI and partner instruments from the hardware, with a new direct connection into Kontakt and on-hardware DAW transport/mixer control for Ableton Live, Logic, Cubase, Bitwig, Studio One, FL Studio and more. The consistent caveats: control of third-party/non-NKS plugins is more tedious (rough parameter names, awkward pages) unless you wrap them in Komplete Kontrol; Maschine integration from the MK2 was removed; and Logic in particular is a weaker host for large plugins. Early units also shipped with driver and DAW-crash bugs, which a run of 2024–2025 firmware updates largely resolved — recent buyers report full DAW integration and stable operation.
“The MK3 now has a direct connection into Kontakt 7, which means all its browsing and tweaking features can work with Kontakt running standalone or in a DAW.”
MusicTech
“Using non-NKS plugins is slightly more tedious; while they will load in the Komplete Kontrol software, the parameter names you see on the controller screen are a little sketchy, as is the arrangement of controls.”
Higher Hz
“There are some frustrating limitations (no Maschine integration, lack of MIDI template support right now), but I knew those going in.”
u/bodhi_sea · r/NativeInstruments
Measured
Per NI: NKS 2 auto-mapping across Komplete, Kontakt 7 and third-party NKS instruments; on-hardware DAW control for Ableton Live, Bitwig, Cubase, Digital Performer, FL Studio, Logic Pro, Pro Tools and Studio One. Maschine hardware integration present on the MK2 was dropped. The controller is MIDI 2.0 compatible.
Two parts. The included bundle — Komplete 14 Select (15,000+ sounds) plus additional instruments and effects and Ableton Live Lite — is widely called generous and a real part of the value. The Komplete Kontrol software that ties the hardware to your instruments is more mixed: it does its core job and is actively maintained, but power users note it hasn't gained much lately and can be awkward (and, for some, doesn't scale well on high-resolution displays).
“it does come with a very impressive software bundle in the form of Komplete 14 Select, with over 15,000 sounds.”
MusicTech
“Komplete Kontrol software: this hasn't been receiving much love the past few years in terms of feature updates, but it has been actively maintained and does its basic job pretty well imo.”
u/Minnanokazehaya · r/NativeInstruments
Connectivity
Strong consensus · 6 srcStrong for a controller keyboard, and bus-powered. Two USB-C ports (one for data, one for standalone power), full 5-pin DIN MIDI In and Out, and four assignable TRS pedal inputs (with default sustain and expression) sit on the rear; the unit is MIDI 2.0 compatible and draws power over USB-C. The only wrinkle owners raise is that it isn't strictly plug-and-play — it needs NI's hardware connection service installed, and a small number of USB chipsets can require a hub.
“Two USB-C inputs, one for standalone power and one for your computer, full-size MIDI DIN In and Out connections, and four TRS pedal inputs: Sustain, Expression, and two others that the user can assign to their liking.”
FutureMusic
“Separate USB ports are available for data and power, and there are four TRS pedal inputs on the rear for sustain, expression and two assignable ports.”
MusicTech
Measured
NI's I/O: two USB-C ports (data + power), 5-pin DIN MIDI in and out, and four assignable TRS pedal inputs including a default sustain and default expression. Bus-powered over USB-C (a 5V/7.5W supply is needed only for standalone use); MIDI 2.0 compatible.
Portability
Moderate · 3 srcA full-size 49-key desk keyboard rather than a travel controller, but bus power helps. At about 5.5 kg and 80 cm wide it's manageable, and — unlike many full-size controllers — it runs on USB-C bus power from the computer, so there's no wall-wart to place in a normal setup (a separate USB-C supply is only needed for standalone use).
“Normally, you’d connect to your Mac or PC over the supplied USB-C cable – which also provides power”
MusicTech
Measured
Kontrol S49: 802.2 × 323 × 86 mm, 5.5 kg (about 12 lb), bus-powered over USB-C. It's the smallest of the three Mk3 sizes (S61 is 967 mm / 6 kg; S88 is 1353 mm / 13.5 kg).
Premium materials, with a longevity caveat. Reviewers consistently praise the new unibody aluminium construction, the anodised-aluminium knobs and wheels, and the large glass-surfaced colour screen as feeling high-end. The dissent is about how it ages: at least one owner reports the soft-touch coating peeling and inconsistent build over time, and a few note plastic key noise developing with use — likely unit-to-unit variation rather than every board.
“The build quality is superb, with a new unibody aluminium construction plus capacitive metal knobs boasting a premium feel.”
MusicTech
“Very inconsistent build quality.”
u/GrumpyMonkyz · r/NativeInstruments
Measured
NI's spec: a CNC-machined, bead-blasted and anodised aluminium control surface, a high-resolution 1280×480 colour screen with a glass surface, and anodised-aluminium knobs and pitch/mod wheels.
Contested, and it turns on how deep you are in the NI ecosystem. Supporters call it a flagship that earns its price — a superb keybed, class-leading integration and a premium screen and build, the current best-in-class for NKS users. Skeptics counter that at around $749 it's expensive for a controller with no drum pads and only eight knobs, that much of the value assumes you use NI software, and that the S49 is priced awkwardly close to the larger S61 (which many say makes the bigger model the smarter buy). The Komplete 14 Select bundle softens the price if you'll use it.
Where it splits
Worth it — a flagship that pays off if you live in the NI / NKS ecosystem45%
“the third incarnation of the Kontrol S Series of controller keyboards may be precisely what they have been waiting for”
FutureMusic
Expensive for what it is — no pads, and the S49 sits too close in price to the bigger S6155%
“I wish the S49 Mk3 were cheaper; its price is too close to the S61 Mk3 to make it a sensible option.”
Higher Hz
