These are beautiful fish. I have tried twice to keep one in my tank (not at the same time). Both, unfortunately did not make it past 6 months. I qt'd them....both. I don't know if it was bad luck, or bad capturing and bad husbandry at the lfs or just not able to coup with the badgering of the other tank mates? I now have a Japanese swallowtail that is going strong, so far seems to be a hardier fish.
As far as being in a reef, when I did put them in they never went after any coral.
I wish you luck, they are indeed beautiful and ideal for a reef tank environment.