I went in blind...yes blind! My daughter works for a dentist and talked me into to getting my teeth whiten, but I had no idea what would happen. Yes, I trusted my daughter...and I should have been more prepared.
I let them clean my teeth prior whitening, which was not smart as that made them sensitive and no one told me about zingers, but boy did I learn! During the first 15 minutes I had 5 zingers in a lower front tooth and didn't know what was going on, but after spending 350 I didn't want to stop. I finished all 4 levels and the pain ended after the 2nd 15 minute session, but later that night my teeth hurt so bad I actually had to take pain medicine.
The next morning everything was fine and I was really pleased with the results. I was given bleach trays and night bleaching and given instructions on how to use everything. I feel that it was a good price as the trays were also included.
Would I do it again..YES it made me feel comfortable enough to smile for the first time in my life!