I just gave my bristle tail away because I watched her go around and nip every one of my LPS corals, especially my acans, which don't seem to be recovering. She even ripped a tentacle off my torch coral, ate the skirts off some zoas, and nipped 2 brand new rics to the point that they have shriveled. They do a good job with the aiptasia, but once they destroy the population there's a pretty good chance that they'll go after something tentacle-y.
Also, I had to pull apart my rockwork to get the damn thing out. Slow moving fish seem to get really fast when they see that net...