My nails were left on aceton for ages (the person doing them got busy with lash and brow appointments instead) and then were aggressively scraped, leaving them in the worst post-shellac condition I have ever seen them while also not fully clear of shellac in places somehow! Also the employees weren't wearing gloves while doing nails and I did not see any obvious decontamination of the tools (like putting/storing them in liquid disinfectant next to the stations).
My eyebrows have been done incredibly thin, I just wanted a touch up but so much of the shape has been taken away that I feel really unhappy with the outcome. They are not the shape I want and I now feel I need to grow my eyebrows out to get the look I want