I had one for 18 months. It was my favorite fish even though it would bury some corals in sand every day. I hope yours is used to aquarium life, I'm sure mine was caught in the wild.
I found it very hard to feed this fish. Mine would get spooked pretty easily and if it happened during a feeding he wouldn't come out to eat, and these fish need to eat 2-3 times a day unless it can sustain itself from the sand bed (from what I read it would have to be a huge, mature sandbed, several square yards I think). It would also back down from any other fish if it were going for a piece of food. I even tried to place frozen mysis right near it's home, but it would get really spooked if I put my hands in the tank and the other tankmates would get to it first.