I had a very indifferent day on on this, sometimes it ran smoothly and brilliantly and at others my shots just wouldn't register at all.
Still love the game mind, I played most of the day with the Gamepad whilst my flatmate and his girlfriend watched tv... this is the best thing about the WiiU for me so far!
It took me a short while to get used to the layout of the analogue sticks and also the buttons, given that on the CCP the analogues didn't click, I'd be pressing X to knife and I'd only go and change to my other weapon! Haha
Once I went back to Wiimote though I owned again! Love that Wiimote I do!
Also, I've ordered the Turtle Beach NLa headset from amazon so hopefully I'll have that week so the game chat will work properly!