I've kept a couple of them. Not a good beginner angel, and not a fish for a new tank. Their longevity in captivity is suspect and very few of them live past a couple years. With lots of live rock, a good varied diet and excellent water conditions, you have a better chance of keeping one.
It is not a pygmy angel, but one of the centropyge species. The pygmy is actually C. argi aka the cherub angel, also a centropyge but on the smaller side.