Crest Advanced Seal Tooth Whitening Strips Review

I've been wanting to try a teeth whitening system for a couple months.  I ended up buying Crest Advanced Seal Tooth Whitening Strips because I had a coupon for it and it was the best price for the money.  The Crest strips went on really easily.  They adhered really well to my teeth.  I was even able to drink water with them on.  This was really convenient since you have to leave them on for a while each day.  After the instructed number of days, I did feel like my teeth looked whiter.  For the money paid, I felt like this was a really good product.  The only BIG negative about this product was that the whitestrip use made my teeth really, really sensitive.  Hot and cold food and drink would make my mouth hurt.  Also, I noticed that my mouth was sore from time to time.  This discomfort went away after I stopped using the product.  Also, it was not bad enough that I felt like I needed to stop using the whitestrips prematurely.  However, I have similar comments about different brands of tooth whitening system.