I have the Linktheater LTH-90WN which is the wireless version. I have had it about two weeks here are the pro's and con's based on my personal experience.
Nice unit slim fits under the TV, remote neatly laid out, USB on front and two usb's on rear.
802.11n Wireless works great and without connection issues to my linksys AP.
I stream movies from my DLINK 323 NAS without any problems, it just discovered it!
Video performance for the most part is excellent over HMDI. The unit has a maximum resolution of 1080i and will also do 720p and 576i/p and PAL, by pushing the video button repeatedly.
Plays my Divx collection fine without any issue but initially playback was jerky and I spent tons of time figuring out why. If the Divx file is encoded using progressive and the video mode is set to an interlaced setting playback is indeed jerky, also if the resolution of the encoded file is greater than 720*480 it is also jerky, apart from this all is well with the video. However you cannot fast forward the video more than 2x or it locks up.
H.264 using AVC is brilliant on this player. I use Nero to encode high def video and the picture quality is awesome. No limitations on resolution and no issue on ff and rewind.
Divx/Xvid only supports MP3 sound, no AC3 or AAC passthrough. I have a SP/DIF connection to my amp and if the source file only has AC3 then reading lips is your only choice.
H.264 also will not pass through the AC3 sound and will play AAC in stereo.
WMV9 also will not pass through the AC3 sound.
MPEGII is the only format which will allow you to pass through AC3 but only AC3. If the soundtrack is DTS you are out of luck.
The literature on the product is misleading in this respect. It does clearly state that Xvid/Divx has a limitation of only MP3 playback but does not mention the other codecs as well.
This is a good product for the price. Overall I'm impressed with the video quality and the flexibility of formats. The GUI is easy to use and my wife can view photos, watch video and listen to music without bugging me.
The only downside is the sound options, if your video collection is MPEG VOB files then you are OK, AC3 will pass through. But if you are like me and most of your collection is Xvid/Divx then you are confined to stereo.
I can't help but think a simple firmware update from Buffalo would fix this. Here's hoping.