I currently have two Distortion pedals, a Danelectro FAB, and a Digitech Death Metal.

I Bought the FAB Dis. at a music store for thirty bucks, and the Death Metal at a yard sale, so far, both sound good to me, but are they good quality? I really don't know how to tell the quality of Pedals, to be exact.
If you like the sound, then it's quality. If it sounds good to you, then it sounds good.

That being said, the majority of people will consider both those pedals to be pretty low on quality.