I bought this on sale with a coupon so paid about $10. I've been trying to use it regularly over the past month but to be honest it is a hassle. You have to brush first with one tube and then spit but don't rinse and then brush with the second past. Call me lazy but really I do not want to brush my teeth twice! I do not think my teeth are much whiter but I'm sure the manufacturer would say I do not brush long enough with the product. 2 minutes + of brushing with a change of tubes is too long for me.