This is suitable for those who want a class player at a very resonable price. I wanted to buy the 525, but it had just been replaced with the 535. The internal 5.1 DD decoder sounds fine, much better than regular dolby surround. Therefore u need a DTS AMP or receiver to get a clearer sound. I can say I'm really happy with this model.
Software is easy to use and full of options to set everything from audio to decode rate and so on.
As I'm looking to Sony STR-DB840 as AV receiver, I appreciate the optical out and the 5.1 out.