Picture and sound are absolutely fine, of course I can not expect miracles from a player in this price range. About the LAN - skills can not say anything yet because I only have to put a cable to the player. Have him briefly about the software update on the network had. Even with the USB - connection there were no problems, my external hard drives, and USB - sicks, all were detected without difficulty and quickly, MKV, DivX HD, AVCHD (on DVD) no problem.
So far, I could see nothing that would bother me to this player, I can only recommend the DMP-BD77EG as true nor the price / performance ratio.