I've got one--by mistake. It was sold to me as an A. yanoi, I didn't know any better, and it was Tabblet15 who pointed out to me that it was a Red Scooter. Otherwise having read about Dragonets I would not have bought one for a 15g Nano.
My experience is this (remember I thought it was an A. yanoi):
The first day it was introduced to the tank it ate heartily of frozen Marine Mix--mysis, shrimp, etc. Subsequently it quit eating and I tried all sorts of food including live blood worms and artemia, but it was not interested. It would approach the food, look at it, and turn away. It spent all its time crawling over the rockwork picking at it. I was surprised to see how small its mouth was and assumed that this might be a problem.
After three or four days things started to pick up. It was regularly raising and displaying its incredibly beautiful finnage (which my experience with FW fish tells me is usually a good sign). I observed it eating food particles that were lodged in the rock. I think it is now getting enough nourishment from foraging for pods and nibbling at introduced food. It appears active and 'happy'.
I hope this will continue, but I would not have taken the responsibility of buying it for my tank if I had known what it truly was. However, it is a superb little fish.
I call it the Mountaineer because of its constant rock climbing.