I got mine yesterday, and i gotta say, the build quality on this one is unmatched. I've never had a rep or gen that feels more hefty and durable then this one. But it's a BIG watch. It weighs roughly 100 grams more than a sub, so you are definitely going to feel it on your wrist
I had the 15500 a while back, and absolutely hated wearing it. This one wears a lot nicer, the bracelet is beautifully made with smooth rounded edges. (The inside needed a bit of smoothening out)
The watch is beautiful, and i absolutely love the design, but i'm not going to keep it. why? If i wanna wear a steel sports watch for the day, i would still pick one of my subs over this one.... Guess i'm just not a AP guy, but i did give it a try
For reference, my wrist are 17.5 cm