I've had my CBB for over 3 years now and it is a great fish to have. But, you have to feed them and I feed every day. Initially, I would feed 2 week old live brine to get him sort of trained because he was not eating any frozen food. Shortly after he started eating anything I put in the tank, but I have to hold some food (mainly mysis) between my fingers so he can get enough. Just isn't an efficient eater, especially compared to my hippo tang. It did take a little while for him to go after aiptasia but I can't find any in the main tank. He cleaned out the feather dusters too. Never seen him or my flame angel pick at any coral, but he did nip at a clam the other day. That's the first time I've seen him do that so I'm not sure if there was something he went after near the clam. I haven't seen him do it again or any signs of nips on the clam. For the most part it seems that when fish are well fed they don't go after corals or clams, and often the people that talk about that feed less often.
Anyway, for what it's worth I think it's a geat fish to have and I hope it lives forever.