I'll chime in that I just got one for my mom for Mother's Day. She wanted something for her sewing room and her phone and mp3 player are both awful, so I'd recommended she look into a cheap tablet. A couple days later I saw a deal on one, so I jumped. I have an Android phone (original Droid, and now RAZR Maxx), so am familiar with them, but haven't played with an android tablet before. What follows are my impressions.
She unwrapped it, thought it looked great and we plugged it in/turned it on. Initial setup was quick and easy, and it goes to the Amazon desktop (basically their fancy Home replacement). Part of what she wanted it for was so she could just upload all her music to The Cloud and just stream it from wherever, so we look into that. It turns out Amazon wants $20/year for that service. We're both amazed at this, so we look into google. Except, you can't get to the google store on this thing. So we hem and haw a bit, and I finally decide to just root the damn thing and stick all the google apps on it. Small hiccup there, but mostly twenty minutes later it's done- it also installs a new home screen (Go Launcher or something. Seemed fine). I walk her through it and how to connect to her google account (she has some sort of crappy Android phone, but is unfamiliar with apps for it because it's so shitty), and we get to uploading all her music (around 20gigs).
After that, it seemed pretty nice. She loves it- small enough to throw in a bag, and it seems plenty fast- apps launch quickly, Netflix plays fine, etc. I honestly can't imagine having one and keeping it stock- it would seem pretty useless to me to not have access to widgets/music/google apps- the things Android is good at.