I've had really good luck w/ a Craftsman Supersux 10,000 or whatever it's called. Vacuuming up cat hair, nails, broken glass, dirt, dust, more cat hair, rocks, even more cat hair, etc. works great. One thing about vacuuming cars is that the vacuum builds up static really fast so that I get continuously shocked the whole time I use it on the car. Some folks might enjoy it.