I had one of these guys thrown in with some other things I had shipped to me about 4 months back, and mine seems to be doing fine. I would have never bought one outright, since I generally hear things like what a4twenty mentioned. (I don't disagree with him in general, btw. I haven't heard too many success stories..)
However, my flame seems to be doing fine so far. I spot fed him phyto for the first couple of weeks about two times a week, but stopped doing that quite a while back. I might just be lucky, not sure.
Also, I would be surprised if your scallop stays out front like that, expect him to find a nice dark place and shuffle over to it. I don't generally see mine unless I take some time to find his newest spot, which is usually not too visible.