Yes, he fixed a sticky aperture on my Pentax-M 85mm lens. It didn't quite work out the first time, and he took it back, fixed it for nowt, and paid the return postage. Top stuff...
He'll also tell you if he doesn't think he can fix something. The standoff spring on my Pentax ME is broken (diagnosed by Miles by email), and he apologised that the spring was impossible for him to source. I've put it into cold storage while I decide whether its critical place in my photographic life justifies a much more expensive CLA somewhere else!