Just got a Nexus 10 from a nearby Staples last night. They have their holiday return policy going, so I can return it by January 14th if it doesn't do it for me. I may even return it even if I like it, since I got the 32GB and I think I might be perfectly fine with a 16GB. I'll know more after I put more stuff on it, but $110 (with tax) cheaper would be very attractive to me.
So far it is very nice. It's already a dramatic improvement over my Asus Eee PC 1000H that I bought about 3-4 years ago at this point. I'm downloading a lot of apps to try out. Since I have an android phone I already have a few that I like (mostly free).
I'm kinda kicking myself now for buying it right now. Not because it's bad, but because I think I should have bought a Nexus 7 first to decide if I like the 7 enough to not need the 10. I've tried out the 7 in stores, but always came away thinking that the screen was probably too small for me, so I'm not sure how much a difference using it for a week or two would make.
I do love the 10's loud, front facing speakers (better than my Netbooks) and the screen is quite nice (I think it's at least 5x the resolution of my netbook, haha). It feels amazing too. The back material is so perfect for a device like this; it's very grippable without feeling cheap (odd that there's that weird removable flap on the back).