Save your money. I used this to get cat hair off my couch and all it did was spread it around in clumps. Absolutely worthless.
Cat Hair Be Gone!:
I've purchased these little spongy things at the pet store for twice the price. They're GREAT at pulling together cat hair on quilts, fabric-covered couches, etc. to make it more manageable to collect and throw out. The only slight downside is they have a weird rubbery smell that can rub off, but it goes away shortly after use. They seem to last several months before drying out. Will buy more from Amazon in the future.
Does an okay job on some things...:
I was lured by the idea of not having to buy lint roller refills ever again, but it seems that this lint remover is actually very hit-or-miss. It does pretty well with lint and pet hair on the couch and other solid objects, but taking the cat hair off of my sweaters and jackets it another story...it just doesn't quite get the job done. If your main concern is upholstery or some other fabric-covered item, this is a fairly good product for that, but traditional sticky lint rollers may give you more bang for... more info