I ordered and bought because I was so convinced of the customer reviews these nail hardener. At first I was really excited because he did immediately my soft nails hard. But the joy was only 2-4wochen and then the first symptoms were added as burning so that felt like a scrappy skin with hammer. I could see the pain but well tolerated what totally makes me unhappy but to date this is my nails looked previously beautiful and powerful than were with Herome. The brhandlung was before ca.7monaten and my nails look terrible totally brown grow more slowly see dry out. Slowly it gets better from month to month. But I'm going to buy him niemehr. For each, it looks natural else maybe you should first buy the blue. Or you can use the red 2 weeks BIS3 as therapy and then a draw is without formaldehyde term. Gruss Maria