Quality and user knowledge are
Quality and user knowledge are not there. Nails are too curved so for average nails (not model standard) they are painful. Nail glue is really bad : nails teared off in less than 24h (I waited 1h as recommended, no water and I did average PC stuff, nothing hard). Finally, esthetically, they appear really cheap. Roxy nails and Doonails are far better.