Most of what I have seen on other sites seem to indicate they do not work much better than the normal methods, but you have to take everything you read on the net with a 50lb bag of salt... as opposed to just a grain.
I have seen too many great products get terrible reviews for the stupidest of reason, many not having much to do with the product itself. Things like poor shipping, not reading directions, etc.
If you try this, then make sure to let us know.