I've heard a few negative comments about this product, mainly about lip syncing. If people took the time to RTFM (look it up) they would see that you can adjust the sound delay in settings, which solves this issue.
People have also mentioned the sound quality. I'm not sure what people are expecting from a unit in this products price range. I find the sound adequate atleast. Sure my Denon gives a much deeper sound, but it also costs alot more.
The only negative I can find is with the supplied hdmi cable. This unit plays 3D blu-rays, but you will need a high speed hdmi cable to view 3D movies on your 3D tv. Also, note to Sony, how hard would it of been to include wireless connectivity? You have to buy a dongle if you want to use this feature. A dongle you can only buy from Sony. Tut.