It's a basic amplifier with good quality components and a neat assembly. Power rating at 50w/ch seems fair, but I got a 35w/ch Harman Kardon and a 30w/ch NAD that were more powerfull (and much more expensive) than the AudioSource. Sound quality is very good : it's neutral, clean and without audible noise, hiss or distortion, even at near full volume.
I don't like the Auto-Switching inputs system, wich is too sensitive and keep switch between input 1 and 2 when there are quiet passages in music (on input 1). So I use only input 2. The same problem apply to the Auto-Sensing Power On, wich is useless for me.
Overall, it's a great buy for the price.