I have studied all these machines! Reading magazines in France and also abroad, videos ... and the conclusion came to me: either we exercised in nail and Peggy Sage invests in a machine is the machine is purchased. I plunge and I love it! The promises are kept, taking care to respect the instructions found online on you tube: 1) pass the nail spared alcohol (cheaper than another product. 2) base coat layer fine fine fine, well-wrung the brush: 30 ' 3) Color 60 ' 4) Color 60 ' 5) top coat 60 ' 6) passage of the nail spared alcohol and TADAMMM! hard nails, shiny, beautiful.