I had one years ago for a short time...made the mistake like most....who can resist a bright orange tube anemone!
I asked the lfs if the there was a reason I was forgeting why I never got one....I had researched them years before then...just forgot there bad rap! was told nope!!!
Anyways took it home and it did fine for a few weeks..no problems.....until the fish started to chase each other around one day....and eventually one just touched a tentacle...yes just one......anyways that's all it took ....the fish was like having seizures or something....I tried to remove the piece of tentacle that had boke off and stuck to the fish....it didn't help, it was too late....also lost a couple of pipe fish to it, before it was removed.......hth