l'expérimentation d'un savoir-faire

This is a list of the advantages of going to a particular beauty parlour. What does this mean ? Anything like:
Safety guaranteed by the testing of a craft ??? Or something else - thanks for your opinions !
La sécurité liée à l'expérimentation d'un savoir-faire
  • It means they have lots of experience and knowledge, so you are safe in their hands.

    They won't chop your hair off when you ask for a little trim and other such catastrophes I've suffered in my life :D
    Or snipped ears... Thanks for your reply, Sunny. So, how about "Safety guaranteed by the experience garnered in our craft"? Do French people think this conveys the sense ?
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