I regret to say that I have used this jewelry repair many times and in December I decided to take my Fiance's 30 yr old 18 K gold chain to be fixed for a Christmas present. I asked them to fix the clasp and clean it. Well I was impressed alright but distressed when my Fiance swore it was not his chain and upon verifying it with another jeweler found that it was 14k gold chain. Therefore I was robbed. I did not know it at the time and it was too late to report. So my recommendation is NO they are not legitimate and I will report this to Concord Mills Management also. The only reason I gave it a 1 is because I won't allow none. Louisa of Charlotte, NC