The key is to make sure they eat. Once they're eating they're really just another tang. But you really do need to have good water quality.
Here's a pic of mine:
They are definitely a difficult fish to keep. Most times they are very finicky eaters. Very few people are able to keep them unless you get a very healthy specimen.
Agreed. I was very fortunate to get mine to eat as quickly as I did. She was eating the second day. But unless you have plenty of room for them to swim and hide, atleast 180g IMO, do not buy one because it will most likely not make it through the first week.