Summary: As this is a Denon it probably sounds good IF you can get it to work. The setup is a nightmare, but it till the end of this review before you make a judgment. I am no expert but I have set up four AV receivers before, two of them, and this one defied all my efforts. The owner's manual is an atrocity. Even to experienced people it's frustrating. I called in a favor from a friend who installs AV systems and he also failed to make it work. He was scornful of this model.
Summary: I have been amazed by the sound of this low cost receiver in both stereo and surround sound modes. I have a good collection of good receivers such as NAD T-753, Reotel RSX-965, Carver HT885. I have never thought of Denon when it comes to stereo. I bought a used Denon AVR-589 because it is so cheap but now I am surprised by its sound quality. I set the AVR-589 audio mode to "direct" and turn off the display to get the best possible sound and this receiver sounds amaziing.
Summary: Overall this is a great unit for the money. I had a bit of trouble figuring out what the display on the unit was indicating while I did have the manual in hand at all times. I also had some trouble understanding how to use the Audyssey auto-config. Once I got over those minor hurdles, the system automatically sets levels equalization and cross-over frequency. Sounds great!
Summary: I was looking for a fairly inexpensive unit to drive a 5.1 system in my home away from home work abode. I was wary of the "refurbished" tag but decided that I couldn't lose at the purchase price. I was not disappointed. The unit arrived in a timely fashion and appeared new. All functionality was op tested immediately and it was a "go" right across the board. The on-board DTS is "NEO" only though so beware if you are looking for a fully DTS capable receiver.