I can attest to it. Previously I sent my Leica IIIf w/ lens to Mr Tay for CLA which he promised to be done in 2 weeks time. It has been many weeks past and I am still waiting for it
But I believed he really takes pride in his work. He had changed my LC-A leatherette, from start to finish I had watched him - very impressed with his attention to details. He even shared with me a tip or 2 about leatherette alignment, etc...
Initially I brought my Moskva-5 on the spot for him for accessment for CLA. He just took out the lens and clean it on the spot! (with his cleaning chemicals, lotsa cotton buds, and pressure tank blower). And he even checked the lens rangefinder focusing, and all these he didn't even charge me a single cent!!
Kudos Mr Tay!