Brought this product to try and control hormonal acne. Previously been on roaccutane for the 2 time however still get the odd few spots which leads to blemishes so am in the market to find something which helps to heal skin. I had a sample of Dr Dennis Gross skin peel which was amazing so I thought I would try this. Designed for individual spots and it more effective to use for 6 mins then 3. Downside it goes through batteries like no mans business. You need to have loads of batteries on reserve as it will just die. I was using it expecting to see results after a few days but it says on the box to use 2 weeks daily to see results, I never got that far however skin has improved slightly when I was using so it did make some difference.