This is a nice system. Plastic trays didnt work well for my teeth arch, I found it too short. So my molding compound was sticking out, but my trays came out pretty well anyway, and I liked them better than the one I got from my dentist, because they didnt cut them too short and product wasnt licking so badly. Bleaching gel is strong for me and it did irritate my gums, and my teeth are sensitive to the product. I was doing the system once a day for 3 days then I was waiting for my gums to heal and then did the system again. So it took me longer than 2 weeks. But my teeth are whiter now. And I am happy with the result. And yes you get a lot of product and it would last you a while.
This product is great, easy instructions, quick ship time. I really liked the custom fitted trays, they are way better than the football mouth pieces other companies have. My teeth became whiter after just 3 applications. There was plenty of gel left over for future whitening if I need to. I've recommended this to alot of my friends and family. Eight of them that I know of have bought this product also and have been very happy with the results. Also it's a great deal for what you get.