If you are talking about the pom pom crab (thats what i call em) then yes I have had two of them. If you like the fact of knowing that theyre in your tank then they are really cool. However they are like ninjas and you rarely see them. It is always a treat to see them out.
Yes I have one of these little guys aptly named Pom-Pom, on a rather interesting side note when I bought him he only had one anemone but recently the one has split and become two now he has a complete set of "Gloves"