I don't see a lot of pics of this watch on the forums, so I thought I'd share a few. I just picked this up today and my first impression was very positive. It appears visually accurate, well constructed, and it's a sharp looker that goes well with browns and khakis. I think it makes for a great office watch; conservative and professional. I also have a new buffalo leather strap from Germany on order, which should be the perfect replacement.
This is a very impressive rep. It looks gen-like and well constructed.
Here are some quick phone pics. I'll post some proper outdoor shots another time.
I've read from other members that you should be able to walk into a Cartier boutique and ask for a replacement strap for your Santos 100. Obviously don't wear a replica going in there, and it wouldn't hurt if you dressed nice. They sell here for around $325-$375USD. There is a Hong Kong Boutique page here.