I'm on my third 928 now. First one had screen issues and the battery was bad. The second one also had screen issues, the ear speaker stopped working, the speakerphone worked when it wanted to and the buttons were "blotchy" I guess just like everyone else, and my nokia monster headphones with buttons that are supposed to work with the 928, stopped working after the Amber update which took two days. I thought it was bricked then the third day, I woke up and it was working but as I already stated, the ear speaker gave out, the speakerphone acted up, and the headphones buttons didn't work anymore.
I'm on my third now and it's almost perfect. Only issue I can find is the 3 buttons are still a little "blotchy". This one updated and reset correctly and didn't take 2 days like my last one, my nokia monster headphones controls work now which is huge for me. I really wish the workmanship of these phones was a lot better because I love WP8 and I have honestly got 5 of my friends to switch already because it is really good.