personally i like the s4, looks decent and seems to have good functionality, there are a couple things i'm not sure about tho. NI have said a few times how good it will be for mobile dj's but then they go and leave out a dedicated mic section. also regarding the software, NI have hardly said anything about traktor, seems like all this fuss is about the actual controller. I think there will be another announcement with more facts about traktor. And notice how in all the screen shots there isn't the little button to reveal the grid options? So i think that will have had a shake up.