Not happy with them. Service was done on my diamond rings to change the prongs. Was told that it should be safe yet if it either of them loosened, they would tighten. We went back because one was too loose, spoke with one of the techs and a tall man rudely said without addressing us directly "nope, we only warranty for 90 days." We said. So the prongs should only stay tight for 90 days? He continued to recite "we only warranty our service for 90 days." What kind of quality and pride in their service is that? Would never use their service again. Poor Quality of work, Poor Customer service. Had to give one star because comment won't take with no star, which is what this business deserves.