Off-screen play has been brilliant. As soon as the TV is needed, or if one of the kids wants to play the PS4 and the other is still playing the Wii U - they can be played simultaneously. Also, having the touch screen is much easier for typing and using the internet.
For playing games - it hasn't really been a real must-have, except where the games themselves are designed with that extra dimension the gamepad can provide. W101 was amazing in that respect. But there haven't been enough of them - yet - and even then, I'm not sure there will be.
I found it almost impossible to use for Mario Kart, but oddly, it feels more comfortable if I use it for Smash (although I only use it if I draw the short straw).







