Pearl scale butterfly experiances

[toytech]

On the weekend when I was out and about I saw a pearl scale butterfly at a lfs and I remembered way back at the genesis of my first tank I had one of these fish . I had it for just over a year and then lost it in a nem explosion , it was a good eater but was twitchy from day 1 and the one I saw had the same twitch (though it was not in the best of stores ) . Does anyone else own one of these fish , did you have problems with parasites/desease ? And when I had one I didn't have much for corals and I would really like to have one in an sps dominant tank that's in the works so if there sps friendly let me know.