The aspect of CONUS service is important too... I once sent a vintage piece to Zig and waited ... and waited ... and waited for it to arrive. You guys think it's stressful waiting for TTK to send a rep? That's nothing. This was a vintage Sub and it had disappeared into the morasse of the postal service.
Anyway, WEEKS later the package came back from Customs, opened, with a note describing how they're unable to pass replica watches. I was out the money I had spent for maximum insurance, expedited delivery, special handling, warm towels, a cabin on the weather deck, roadside assistance, OnStar coverage, and Geico's miserable little lizard's retirement package. Plus I'd lost my slot in Zig's schedule. That's what really hurt.
So long story short, CONUS watch repairmen would be great... if they have the mad skillz.