I just bought this microdermabrasion kit one month ago, and I have been using it twice a week since. It DOES really work! My skin is definitely smoother, it looks more "fresh", and after one month, the thin wrinkles around my mouth and on my forehead are less visible. I do it only twice a week, as I have an extremely sensitive skin, and can only use specific products such as Avene or Biotherm - and I've had no bad reaction so far... I don't use a lot of cream each time, so I think it will definitely last longer than 3 months. Some of my colleagues bought it following my advice, and they love it too! Definitely a very good buy and a real bargain for this price.