Bought this phone on 2-year contract from a Virgin Mobile booth. On a side note, it's not advertised as "601", but I figured this one is closest to the specs of the phone being sold in Canada. Anyway, starting day one, this phone was showing wireless signal problems (mobile network). I live in the GTA, your experiences may vary.
I've had my Nexus 10 for over a year now (ordered directly from Google). Not using it a lot these days, So most of the time it's sitting on the shelf in standby mode (Wifi's off). I occasionally take it out, turn on wifi, to show a Youtube video to my parents, or just play a quick game with kids.