Traktor S4 MK3 : Decent quality, don't need the jog wheels.

Pros

- Proper layout, all important functions are directly available

- Decent sound card

- Faders, FX and Eq buttons have a decent feel, just enough resistance.

- Easily assignable filter FX

- Filter FX are easier to use / more accessible than channel FX

- Combination of filter FX and channel FX allows for interesting ways to manipulate the sound.

- It's reasonably lightweight, convenient if you want to bring your controller to a gig.

Cons

- Filter knobs have little resistance and feel 'cheap' at first impression. Not what you expect from a device in that price range. But to be fair when mixing it doesn't bother me.

- Personal preference: I don't need jog wheels, I'm fine with nudge buttons. Would have rather had separate controls for every deck.

- Deck switching is prone to confusion, eg. hitting a cue button assuming you're controlling deck C while it's actually A. Practice helps, but mistakes still happen.

- The screens could've been a bit larger and show more info. I got Joe Easton's mod which is a nice improvement, but if Joe can do it, why didn't NI make it such in the first place?

Overall I'm happy with the controller. I can carry it to gigs and it all works like a charm. I might switch if a new version becomes available that replaces the jog wheels with deck controls.