I have had this receiver for 1 year now and all I can say is WOW. This thing s a beast of a machine it has just about everything you could ask for and more. It is a 11.2 channel receiver with 9 internal amps that can be confederate and any way you would like, but goes up to 11 channels with a 2 ch amplifier added. It has all the known sound modes you could think of and HD radio Pandora etc.. I have had every Denon Pioneer and Onkyo for the past 6 years and this one is the best I have heard so far it is a really beautiful receiver in everyway. I have mine setup for 11.2 channel output and sounds incredible with a rotel rb-1066 taking care of the front right, front left and center channel. The receiver has a new feature that I think is really cool and that is dialogue enhancer witch raises the volume of the center channel really helps when you can't hear what somebody is saying turn it on and you hear what they are saying all the way down to a whisper. I had the denon avr-4311ci before this one and I can say the two units do sound different from each other. The avr-4520ci just sound more precise then the avr-4311ci. If I was to give this a star rating out of five stars I would give it a five out of five You really have to hear it to believe it words doesn't do it justice. I really don't have any cons about the receiver I just like it to much. It has multi eqxt 32 witch really helps with calibration it is a eight point calibration setup but can be upgraded to pro version if needed witch does 32 point calibration and has 32 bit dac's and al32 for the first time in a denon. It has a great video upscale too will does a great job for what I use it for. You have two hdmi video outs that can play video and audio at the same time and two different pictures I run this receiver with the KEF Q series speaker's and it is a great match. IF YOU GET THE CHANCE THIS RECEIVER DESERVES A LISTEN.