I really like my Trachy's. The color variations are limitless and they are less expensive then scoly's for sure. One thing I wasn't expecting is their size increase. They can literally inflate to over twice their size which makes placement a concern. I think mine have grown in diameter also over the past 3 months and now when they puff up they really crown some other corals. No aggression yet but I may have to see about giving one or two of these to my coral shop for some store credit. They are really filling up the substrate but I still love them.