I guess my question to those that say that mechanical watches are so inaccurate, whats the big deal about 10-15 seconds discrepancy? I always strive to be early no matter what (if you're 15 minutes early you're late), so I use my watches as a guidline. "Its around 12:30" or "Its close to 3:10" I don't need to say "Its 3:09:45" A person doesn't need atomic accuracy, if they think they do they need to take a long hard look at their life and figure out why they feel the need to have everything timed perfectly down to the atomic level. That is just a recipe for eternal stress.
Re: aren't mechanical watches wonderful- not really Ah, but your used Rolex would now, most likely, still be worth your original purchase price.(taking for granted that you haven't abused it, or caused significant external damage to it). That's more than you could say for your Eco-Drive.