I'm always on the look out for tools useful for model building. I was in Wally World's craft section the other day and they were putting these on the shelf as a new (to local Walmart atleast) product.
It has a nice heft to it, comfortable rubber fingertip grip, and a very postive system for holding the blade in place. Makes me wonder why X-acto or Excel hadn't thought about it. When reaching for a medium duty hobby knife, I think this one will become a favorite of mine.