I have been doing builder gel for years but this treatment completely ruined my nails! I came away with the skin around my nails raw and red from imprecise buffing and overzealous cuticle cutting - it stung for days to wash my hands and was bleeding too. My nail’s themselves were completely over buffed and have been left destroyed - they continuously break and are too fragile to apply any other polish or even to file. I have never experienced anything like it - if I could give 0 stars, I would!