And many are of the opinion that these fish have a poor survival rate in captivity, PLUS they perform an important job in the wild, and therefore should be left on the reef. I'm one of those, but JMO.
I have one and it's a great addition to my tank especially with so many tangs. The true test will be this weekend when I add an Achilles to the mix. We'll see how effective it is then. The cleaner seems to be doing well. I've had him for over 3 months already.