I tried them a few months ago & although they are lovely fish in my experience they didn't last very long. I had 6 of them (2male,4female) & over the course of a few weeks all but one died off. I then tried 4 from another fish shop & had the same problem. I've subsequently read a few posts on various forums were other people have had similar issues. Apparently the farm bred ones are a bit weak. If you could find a local breeder you'd probably get a better example of the species.
I'd happily have some more if I could source a local breeder as I think they're a nice alternative to similar sized fish.