Initial impressions are very good.
Network connection was easy using powerline connection as wireless can be a little hit and miss in the fireplace where the gear is located. I have not been able to create a share on my windows 2008 server that the LG can see so have resorted to Tversity, it seems MS stopped with DLNA compatible shares after server 2000 and XP from what I can find on the net!
As regards formats I have only had 1 failure so far, an H264 file, everything else (MP4,divs,xvid,mkv) has played seamlessly. Updates have been simple over the internet, and a small download to give access to an engineers menu has made the player region free for DVD.
It is fast to load both DVDs and BluRay discs, no errors playing either so far, and the picture is fantastic on those limited discs I have been able to get hold of for testing.
Connection to the TV is via HDMI, connection to the amp is via coax digital, no problems experienced with either.
I havent tested the front USB connection yet, apparently it supports both usb sticks and HDDs, again I wont need to burn a disc to take movies through.
Finally, the link to youtube is a bit gimmicky but it browses, searches and plays videos from youtube seamlessly, certainly gives a break from crap TV sometimes.
All in all I love this player. It really does all it says ont he tin so far.