Those attachments for drill motors are pretty cool, as concepts. I've got a belt sander (thanks, Uncle Charlie!), a sabre saw, and a circular saw. The saws are just about almost nearly as fast and accurate as sawing by hand. I've never tried the sander.
I suspect they were gateway drugs to real tools - use one for a while, get frustrated, go out and buy a real one, rather than going back to the hand tools that had served you before.
And that is a SWEET little drill motor!