I have been using the 1.5mm on my stomach every other day for 2 weeks now. Unfortunately it has left a bumpy red rash which lasts for days so I have discontinued use until it disappears. I am trying to tighten skin that is lose and wrinkled due to childbirth, age and sun damage. I have not given up and will try the roller again when the rash disappears. I have used the .5mm on my face for the last 3 months and notice a significant difference in the size of my pores, the firmness of my skin, and I think in my melasma. I was disappointed that even though this is a Canadian company I was charged in US dollars. No where on the website did it say the prices were in US dollars. I did not see it until I looked at my credit card statement and saw that the exchange rate had cost me an extra $40. So be aware of this.
