I've seen the crittermite fly before but never tried tying it. I was not convinced the tails made a difference when it comes to catching fish. I read a post recently on forum I follow where an angler caught some decent smallies. Sure enough the fly in the fishes mouth was a version of the crittermite.
I tried tying the same version but with a small twist. Instead of dumbbell eyes I'm trying tungsten heads. I think they give the fly a good look.