Instruct: Classify an Amazon review as either positive or negative.
Query: Can't be original product

I've been using my Oral-B electric toothbrush for a while now, and I love it. Seriously. Best money I've spent in a long time - no one likes pain in a dentist's chair, and my exams are always great now.[...]. Unfortunately, though the head LOOKS like an Oral-B head and is branded identically, it is not the same product.Luckily I have not had the destructive, painful experiences of some of the one-star raters, but was clear from the first use that it's not the same product. The plastic bristles aren't very flexible so they don't really get around a tooth; the texture is different, too -- like it should be squeaking in protest. They simply don't do the job the "real" product does.I bought two packs - I will probably return the second, as I'm not sure they will accept the first one that I opened.