Haven't kept one personally, but I've read a lot about them.
Apparently they are very timid, and you generally have to spot feed them for a while until they get used to the tank. They also hide out most of the day except to come out to eat when they are comfortable. Also, don't forget they are poisonous
Got the poisonous part. I'm not sure then if I want one if they are really timid. Then again, people say possum wrasses are timid and I see.min all of the time. He even comes to the front of the tank to cruise along and hunt for pods on the snails. Lol