I've only just hooked up my a720. First Yamaha I've had. I previously used an Onkyo HT-RC180, but just like every other 180 and NR806, the HDMI board failed. Zero response after repeated attempts to reach their customer service and NO help fixing a unit that burned out a month after mfr warranty ended means no more Onkyo for me EVER.
First impressions of the 720: It looks great and sounds great. I'm mixed on the GUI. It's simple to use but a little non-intuitive for a couple of functions. In other ways, it seems too simplified. Physically, this has a smaller footprint than the Onkyo, is much lighter, and seems to put out NO heat. I will miss the fold-down metal cover from the RC180, but the a720 is still an attractive unit, and after I found the dimmer control for the front panel, it's less imposing.
I haven't upgraded to 3D TV and bluray player yet, so I don't know anything about ARC and such, and I'm not using HDMI passthru. I have a Westinghouse monitor from which I've removed the speakers and do all my audio through the receiver. The Westinghouse only has DVI (but with full HDCP) inputs, so I have a HDMI-DVI cable to it, and the a720 appears to recognize that and has no problem.
The firmware update went smoothly and took about 15-20 minutes over the network. I'm using a wifi game adapter plugged into the ethernet jack.
I LOVE the iPhone app. Compared to Onkyo remote app it is SO much smoother and fuller-featured. I'm sitting at my desk in a different room controlling the receiver with my iPhone selecting different net radio stations. This is great!
Only two difficulties so far, so if you've read this far and can help me out it would be much appreciated:
1) I have an old Game Cube hooked up with the composite cable, but there doesn't seem to be a way to feed composite video to it and analog audio. The AV1&2 inputs only have digital audio in. Any workaround??
I figured this one out myself finally. On the input menu, You can select a video input source then up-arrow to get settings and choose the audio source. Great!![/edit]
2) I have the latest HD Roku hooked to HDMI 4, and it's set for 1080p, but for some reason it's not outputting to my TV full screen. The information says I'm only getting 480p no matter how I set the Roku. Is this a negotiation error between the Roku and the a720? Afraid I'm going to have to call support to fix this one, but I'm going to try a different HDMI cable first.
Except for the problem with the Roku, I'm very pleased with this selection. It came down to a choice between this and a Denon 2313 for $50 less, but I took a chance on the Yamaha based on all the positive reviews. So far, so good!