From what I was told last week at an LFS, it's easier to get them to eat than an Achilles. I almost picked up a small one but I decided to research more.
IMO, much easier, what I've known as long as their mouths aren't damaged and you see them grazing in the holding tank, they typically do well. They actually need a decent size tank, not for swimming as much, but with lots of rock and detritus to graze on.