I've had mine for a few days and haven't noticed any disc vibration. Actually, it's one of the quietest transports I've heard.
The player detected a firmware update over the network as soon as I started it up, so I'm running the latest firmware. Overall image quality is fantastic, though I am disappointed in a few things:
1. No option to select between YCbCr 4:2:2 or YCbCr 4:4:4, just a choice of YCbCr, RGB video and RGB PC. I'm assuming it's passing 4:4:4 because my display has problems with that and the chroma test patterns on the Spears & Munsil disc look terrible on YCbCr, so I'm using RGB video. Based on my tests with the Oppo BDP-93, the best results come from 4:2:2 on my display, so not having this option is unfortunate.
2. It crops one pixel off the bottom of the image when outputting 1080p, both in forced 1080p and Source Direct. Not a deal breaker because you'd never notice during actual programming, just a bit silly not to get something this basic correct.
Subjectively speaking, the image quality is as good as the Oppo BDP-93 it has (temporarily?) replaced, and I think I prefer the SD deinterlacing/scaling of the ABT-2015 to the 93's Qdeo. Disc loading is as quick and menus are as responsive as the 93. Avatar Extended Collector's Edition, which can be slow to load on some players, loads quickly and has very responsive menus. It's a very fast player.
Interestingly, this player trips up on a few problem discs in the same spots as the 93 does. These discs include Deathly Hallows and Tora! Tora! Tora!, which both have momentary hiccups on the Denon and the Oppo. My PS3 slim has no such problems with these discs.