Summary: Easy to connect everything especially using the HDMI outputs. Very good sound with 7 speakers (using Bose for all but the 2 rear which I installed Niles in wall flush mount. Biggest disappointment is not being able to use my Sony universal remote. The Yamaha won't turn off with anything other than its own remote, which by the way, is very weak. Overall, satisfied but there are better units out there for the same price.
Summary: After my Yamaha RX-V690 died, I purchased the RX-V661 primarily for relative A/V capability with HDMI. After using the "new and improved" V661, I wish I could have a V690 with HDMI because it is more user friendly, preferred bass/treble control. Also, the V661 speaker volume control is not balanced, where the primary front or A speakers are considerably louder than the B speakers in another room. Disappointed, BUT I ONLY HAD 14 DAYS TO RETURN!!!
Summary: I bought this receiver for two reasons: the excellent reputation of Yamaha, and the special features it offers. The quality of the audio is excellent; I have no complaints there. However, I have been hugely disappointed with the special features. First, the YPAO auto-equalizer feature sounded so great! In use, it produced the worst sound I've ever had from my very high quality speakers. With four full size speakers and a sub-woofer it had no bass!