I have kept one, It was easy to acclimateand ate all manner of food including dry foods. However After 3 months I had to break down the tank and catch it to return it to the lfs.
Reasons:
1. It was the most territorial DA That I have owned (I have had a potters coral beauty and pygmy fireball(have to say potters was the best)), It would nip at all fish including my medium sized tomato clowns.
2. It picked at everything, including zoos clams and sps.
I also found it is one of the largest members of the centropyge and can reach 14 cm
But you could get a less belligerant one I would qt it in a tank with some coral that is not crowded so you could remove it. Also might fair better if added last, which mine was not
Hopw this helps.