This things sucks. Excuse the language, but it rips hair out. More imortantly, however, is the fact that the blades are not sharp at all. This is similar to cutting your ends with dull scissors...You are basically "gnawing" at the hair in an attempt to cut it. This actually contributes to more split ends. You are MUCH better off buying a cheap pair of hair scissors at the BSS and having a friend help you dust your ends.
I had one, used it for a bit then tossed it. Wouldn't even give it away.