mine's on a leather strap and I feel it's more wearable across different occasions. It doesn't wear big as some of the comments above (i have a 7in wrist), and is very comfortable given the light weight and thickness. It's a fascinating piece of mechanical craftsmanship.
Most of their QC issues were from the initial releases, which I believe they've taken into consideration with their COSC release. I've had no issues with my 5303 and the new GMT looks fab too.
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