To be sure you have to send replicas for service...70% of my reps have had no serious issues...some replicas are dead at arrival but then its best to send them back....screws can be loose and thats a pain if they fall out and you can't find them.....bracelets and clasps tend to fail....gold plating can be a disaster....truth is there are problems with replicas...problems with water resistance....
That being said the asian movements keep running, even without service, for years...my replicas from 2004/2005 run as well now as then