Review (4/5): White and sensitive
I have been using these strips for the last two weeks, the first week was fine and I did see results within that time. I am in a bit of pain, though. It's December and the cold weather is killing my teeth. I thought I would have no problem with sensitivity as I have never experienced such a problem eating cold and hot foods, etc. I think the sensitivity will fade, but this past week I have been using only 1 strip per day and wow I am definitely noticing some constant tooth pain. I would recommend these as I think they are working well in terms of whitening, just as long as you can deal with the pain.
Also, I have only used the top strips, and I am glad as I can't imagine how bad it would be to have both my upper and lower teeth aching so much.