For sound: I am definitely not a HiFi specialist, but together with my Canton GLE 490 delivers the Yamaha a warm and full sound. I'm very satisfied. However, I've tested the receiver only in stereo mode, but I think also for surround sound, the sound is good. The power of the amplifier is sufficient for my needs from (25 sqm rooms). Perhaps not suitable for sonication of larger halls, but for a normal living room no problem.
Negative points: You could perform more than the somewhat purist OSD. Since notice that however gets to see only the initial setup usually it's no problem for me. After all, it is output via HDMI and do not like the Pioneer VSX-310 Composite.
Conclusion: Pretty amplifier which convinced both technically and optically. I would definitely buy it again.