The person doing my nails (as well as all other people in the place) was very nice, though not entirely sure what she was doing.
The big problem is that less than a week later (I did my nails last Friday), half of them just went off - which is unacceptable and should not happen for semi-permanent.
Needless to say I am very disappointed to have paid 60 euros for something that does not last DESPITE me being very cautious.