I have the B-rad firmware and it allows you to do some really awesome Mod's to the GUI and allows way more functionality.
I have it streaming from my D-Link Nas (DNS-323) with a wireless USB dongle and it is flawless on 1080p mkv's.
If you a little technical, and know some Linux (you should have no issues Photon) you can make this thing look AWESOME.
Install b-rad. (
http://www.b-rad.cc) and then check out the mod's for it (I really recommend MovieSheets)
The stock firmware is garbage for the look and functionality. The homebrew stuff with this is really what keeps it going.