In the world of you get what you pay for, this is very effective, works well but I found it a bit pricy. Overall, It is worth it, but the price had me hesitating and waiting for a frient to try it first before going out and buying it. I will write back advising how long it lasts as I am not disciplined enough to give up my multiple cups of tea a day to keep my pearly whites.

Price is always really good but have not noticed any whitening and it does not freshen my breath as much I would have liked.