-There is (hardly) any need to worry about the service; bear in mind that it is more likely that someone will post about their service experience if it is a bad one than if everything works out just fine (This is not to say that Omega does not have their issues; they do (IMHO)).(...)I am nervous because after reading a lot of posts on the maintenance of automatic watches it seems as though you have to service them after 5-7 years and Omega's service can be hit or miss.
Anyway, using a local (competent!) watchmaker is a good idea; even if the watch is sent on from there to Omega, at least you have a brick-and-mortar place to go if the service you requested leaves anything to be desired. Most issues are simpler to sort out face-to-face than if you're just another mail in their inbox.