Oh no. I'm not worried at all. I'm rather amazed about the overall quality of high end reps. Like half of my rep collection had to go to the watch smith for total revision and water resistancy (not saying waterproof, though my ZF Fifty Fathoms passed the 100m test) and all those reps are running perfectly precise and stabile. BTW I'm also enjoying my BP Overseas 4500 and it's not at all a super rep - but it is a very reliable watch, beside its beautiful design. Also I am proudly telling anyone who's asking that I'm wearing a rep. I can easily bore people to death, telling them that the Swiss watches at authorized dealers have left their factories to end up with factor 4-6 in price increase. The excellent craft of luxury watch makers is certainly more expensive due to education and labor costs, the watches are certainly more expensive due to investments in tech-innovation and certainly also due to marketing budgets to educate us all about brand image, style and taste and status, of course. Fair enough. I will also admit that I can not afford a real Nautilus, but that I am happy to be able to enjoy the look and feel - and even excellent functionality (after revision). But to be honest: I don't really talk about all this very often, because no one f... cares. And maybe you don't either. However, I am ordering the ZF Diver anyways. As soon as they open up again. Cheers.