Review (5/5): Better than Colgate.
These strips are amazing and work better than Colgate! I know, hard to believe with the price. But with these, you don't get what you pay for, you get more! The gel is thick on the strips, which seems to adhere to the teeth better. They don't slide or slip off the teeth while on.
I used them for 2 weeks and got almost 3 shades difference. Make sure to read the directions because it says not to use more then 2 weeks and DON'T brush before using!