I've had one for about 2 years. As a juvi, it ate a few zoa polyps and some purple mushrooms, no big loss. When it hit full adult colors, there was an occasional nip at an SPS, no major destruction, solved by an autofeeder feeding small amounts twice a day in addition to a huge dinner.
I'd do it again, as it's a magnificent fish. They eat ALLOT, so be prepared with lots of flow and a big skimmer. They put out clouds of waste, which I think feed the SPS (at least mine seem happy), but you then need to get the excess out of there fast.
John