Very pleased with my results after 6-(15 minute sessions) in 2 appointments 2 weeks apart. I was shocked what my dentist wanted for same results of over $500. I am a -1 and started a 15. My husband noticed and said he is now interested. Tamar is very sweet and I have no idea why anyone would rate her any less than professional. My sensitivity was mild and goes away by the next day. It is worth it...she makes you feel very comfortable and overall a pleasant experience for teeth whitening. I used stripes before and never got this great of a result. I feel the stripes are just as expensive over time and not as effective. I am new to the area and was very happy I found T and G!