if you got money go for it if not you can probably find something better for the price [SEP] i do notice a difference and i have only used it twice however you have to do minutes times to complete treatment it literally takes more than a half an hour to complete also it says it is safe to swallow the solution but it taste so gross and makes me nauseous when i swallow it and i did get tooth pain on the first treatment during the round however it was quick and did not linger like the others would overall i think it is ok but i do not think it is worth it for the price point therefore if you got money then go for it if not you can probably find something better