The more you brush the less stray hairs you will find everywhere. I have a puggle who sheds like crazy. When I brush her daily for the first week the second week or she barely sheds. I say that it is worth the money. I also have the vacuum attachment when i brush my cat and that is amazing. AMAZING!!!!
I think the frequency of use with this product depends on how much hair your pet has & how bad he/she sheds. I have two long haired cats- one I have to brush every other day and the other I only brush once a week.