Jacob at MTS is incredibly professional and knowledgeable and helpful. 5 stars. They cleaned and replaced batteries in two Cartier watches for a fraction of the amount charged by Cartier, and did a wonderful job. Also, I had found an old watch that had belonged to my grandfather but which had been lost by my father. MTS cleaned and repaired the vintage watch so that it looked like new, for a reasonable price (including repairing parts in the hand made mechanism)–so I was able to give my grandfather’s watch, looking and working as though it were brand new, to my father for his birthday. I highly recommend this professional watch repair and maintenance firm.