Plenty of options on the rear panel is a plus. For as inexpensive as they are I recommend using them as mono blocks or biamp of speakers as mono blocks. At this point I don't recommend the preamps they sell. It replaces the amp in my Yamaha 992 for my front 2 channels and it really puts the Yammy to shame for the most part. The sound is MUCH warmer and has better bass and more complexity.
Female vocals are better as are wind and brass instruments.
I'd say for every one thing the Yammy does better, the AMC does four better. I know now that I will eventually go with all separates. This amp is a great way to get started on that path. I needed something to get loud. Normally I listen through a Jolida tube amp, which sounds great but doesn't get really loud, so I decided to try the AMC deal.