I was sceptical about this product and bought it as a last resort for a specific client who routinely broke or pulled off any nails I built for her within days (we have tried all varieties and brands of gel, hybrid and acrylic). I sculpted extensions with the Fiber Gel and overlayed with Thick Milky Pink Builder, and her nails lasted 4 weeks without even chipping. I've now done the third set on her with Fiber and no lifting or breakage between sets. I am in awe. I'd recommend this product to anyone who is struggling with tough clients. The gel is quite thick and doesn't self-level. Also does not cure class-clear, but is perfect for sculpting out a base for strength before using normal builder gel.