This stuff is amazing!!! I sell it at work, but I was a believer long before then. I had gel nails for about 3 years, and by the time I decided to get rid of them, my natural nails were in ROUGH SHAPE, to say the least. My mom bought me a bottle of Nail Envy by OPI, and I followed the instructions (two coats, then every second day, add one more coat. At the end of the week, remove it all and start again with two coats). Before the bottle was up, my brittle, dry, and peeling nails were strong and much thicker, and I was easily able to grow them out. My nails ended up getting TOO thick, and I had to discontinue use! Now, I use it as a base coat every time I do my nails, and they're strong and healthy! I maybe break 1 or 2 nails a year, and I'm hard on my hands. THIS STUFF WORKS!