I don't know how this place got any positive reviews at all. They are completely dishonest.
I bought the groupon for a cleaning and exam. They told me that I have the worst possible gingivitis, need laser surgery, and have several cavities. My mouth was terrible and there is bone loss. I was suspicious since I have generally good oral health and never had a filling in my life. I left mid-appointment since it didn't sound right. (I never got the cleaning, since I left before they gave me a "diagnosis")
I went to an established dentist today, got a cleaning, and was told that I have no cavities and my teeth and gums are in great shape.
Stay away! They should be reported and the dentist's and hygenist's licenses should be revoked.