I bought this device to work with a Samsung Series 7 LED TV, and it works fine, with relatively recent wireless routers. It's certainly cheaper than the high street, who tend not to stock it.
It was too slow and dropped the connection regularly on an old Linksys 504T, but is fine with a newer model; works adequately with a DLNA media server (Buffalo linkstation live), streaming video (divx), photos and music.
Not sure about the worth of the design - it looks nice, but is inevitably stuck behind the television where you can't see it.
Ultimately, it will struggle with higher bandwidth demands, but until HD streaming comes to the fore, this device is an affordable entry to wireless media streaming with Samsung TVs.