I have an RDB that I absolutely love. I've put almost 2000 rounds through it in the past year, and it hasn't failed me yet. I haven't owned any other Keltecs, but I have heard that some models can be hit or miss, so I don't know if they have the best quality control, or if the problem guns were early models that didn't have the bugs worked out yet.
This thing doesn't call to me, but I'm curious to see how people respond to it. I'll tell you one thing... We'll be seeing this gun featured as a movie prop very soon. Probably as a futuristic space force gun or something like that.