I fell for the offer of a reduced price for ZOOM whitening which claims 6-10 shades lighter. Well, if my teeth were not going to change noticeably, then the dentist may've informed me. I could barely see a difference and they didn't offer a refund, a partial refund, free trays or a a take home whitening kit, NOTHING. I asked for something and they offered nothing. I was ripped off. They said everyone loves their zoom results so maybe I need more than the one treatment. It was evident that my tooth color was not enhanced at all. I'm disappointed, you may be too! Plus, the assistant allowed water to continue dripping down my neck, from that tool to clean your mouth.