Summary: Unlike some reviewers who found setup of the CR510 difficult, I found it quite simple and intuitive, particularly with the Marantz app to use in entering Pandora and Spotify usernames and passwords (though I'll admit trying to use just the unit itself for entry of that information was a frustrating...
Summary: Bought this unit and it worked. For about an hour. Then it quit and started flashing the Red Dot of Death. Doing a bit of research, I discovered that there is a problem common to these units wherein an internal component fails frequently enough that you can research it quickly by an internet search.
Summary: The one problem I have with this unit is it will not work with my android phone like it is supposed to. I called Marantz and the person I spoke with was not very familiar with the CR510 and also could not get it to recognize the android phone.
Summary: The receiver has some great ideas and the display is extremely clear. The main issue I had with the unit is that it was under powered. If you are looking at a compact receiver, this one can only handle small speakers. Due to the price you are better off purchasing a mini or micro stereo unit.
Summary: This unit replaced a similar one by Denon that often disconnected from my home WiFi network. So far it has worked quite well. A few disconnects occurred after setup but the unit soon re-connected automatically.
Pros: Wide range of capabilities. Relatively small size and nicely designed cabinet. Quite good sound for size and power.
Cons: Somewhat difficult to setup and programming also is not easy. If these were better, I would have given the unit five stars.
Summary: The amplifier itself is very good. Great separation, crisp highs and punchy lows, even when playing from an iPod with a lower kHz encoding, and just fantastic with a CD or vinyl (through the USB). Where it is totally disappointing is in its wifi card.
Pros: nearly audiophile sound reproduction
Cons: The main advantage of this unit, its ability to access a wireless signal, is a frustrating failure.
Summary: This is a great product. Took all of 5 minutes to unbox and setup. Simple packaging, easy to set up wifi. Airplay works great. Receiver is about the size of an Xbox -- for some reason the photo implies a much smaller product. Finish is very nice. Good for a grande place.