Ya know, I really love those guys when people don't ruin them. Jeff's Mom has one and it's just a nightmare. He'll jump up in your lap uninvited, and then bite at you if you try to put him down. (Little satan.)
But the ones I've known that are allowed to be dogs and not little trinkets are awesome. I would just be afraid to have one around my dogs because of the possibility they would injure it.
I really love the wirehairs too. If I were ever in the market for a small dog, that's probably what I'd end up getting.