a lot of the poor amazon reviews relate to an older version which was very buggy, but some firmware sorted that.
That said... mine has started to play up a bit - it sometimes doesn't recognise remote commands (using either my harmony remote or the samsung-supplied one) and when watching something from the HDD this weekend I paused and then pressed play, and the on-screen graphic showing how long was left wouldn't leave the screen. It wouldn't advance either (so showed I was 31 minutes into a 47 minute recording for the remainder of the programme, which made subtitles hard to see). It also remained on screen after I turned it off (!) so had to turn it off at the plug...
The user interface isn't nearly as good as a sky+ box either...