Well, I"ve been thru 'one' I guess you'd say: this is my second. I had bought a google nexus one--google's first hardware sale--and this is my replacement...the reason I had to send it back, was that the screen (battery cover) on the back, just didn't seem to fit right...kind of like those cartoons, where you push down one side of something, and it pops up somewhere else...well, that's how my screen was...it would 'almost' fit...and then pop up somewhere.
Main problem was, that when phone got here, I didn't mess with it for a couple weeks, I was kind of moving up to L.A., so by the time I got to swapping phones and notice the screen problem, I"d passed the 2week, or fifteen day 'grace' period that google gave, so I had to go straight to Samsung, tho google, as always had friendly sympathetic workers there...but no new phone....
So samsung had me send it in, and replaced the screen or phone--I didn't know which--and I've been messing with it ever since. I got the gingerbread update, again, today, so I"m at android 4.2.1. Works good, some 'getting use to' but no complaints...kind of stuff like 'screen not fitting' I figure is just luck of the draw...