pacomac :
I've had nothing but problems with the Nexus 7. Unresponsive touchscreen and crappy wifi, and I'm not the only one. The first generation was better in both cases, but dreadfully slow.
On all three 7-2013s I owned, I had a combination of touch-screen, GPS not working, freeze/reboot, random WiFi disconnects and other issues. The first one had chronic touch issues (nearly unusable at times) while the third one had the worst freeze/reboot issues. The second one had nearly every issue known in the N7's forum but to a lesser extent than most reports.
Going back to my 7-2012 is a little painful in the patience department but at least it works properly.