It is MATTE silver unlike the OEM 83xx Dock which is a glossy silver. I think it looks better on the glossy 83xx dock (pic 4)
Buttons are covered. I like this a lot more actually. I was ify but its grown on me.
Hope this helps some of you. And we can definatively put to rest the 8900 DOES NOT work on the 8300 dock and the 8300 wont even sit on the 8900 dock.