I think the concerns about the DD module are that if it breaks the "fix" is to replace the whole thing. And this = $$$. Also, there are hardly any watchmakers qualified to work on them so presumeably the one's that do can charge $$$ also. But they won't be able to get any original Tudor/Rolex parts as we know how impossible that is now. As for Rolex/Tudor service centre's, surely in the USA where this watch is not marketed, sold or supported in any way then the RSC's will not be trained to work on this movement? Why would they be when no Rolex or Tudor watches sold in the USA have ever used it? Also, if the movement is so hard/fiddly to work on then comparing it to Sub and Daytona prices for sefvicing then you'd be looking at $1000 for a service at Rolex. And if you are in the USA unless you had an arrangement with an AD in place then you'd have to send it back to Geneva yourself to get it serviced or any warranty repairs carried out. We all know how Rolex hate Grey market imports to the USA and how arsey/particular they are about servicing these days.