I use the Furminator (found here http://www.furminator.com/). I bought it off of ebay since it was a lot cheaper than through other sites. It works pretty well in my opinion although I've never tried other types. I can run it through Bella's coat with one short stroke, and it will remove a good amount of dead hair from the undercoat. When I'm done brushing her, I have the bottom of my trash can full of dead hair. It works 100x better than just using a slicker brush.