My biggest concern is with the size and thickness as well. Being 41mm in diameter and quite thick is the only concern. I only had a short time to try it on when I was at SIHH, so I'll probably look at it more closely once it comes stateside to determine the size.
If it all pans out, I'd procure the steel version. I like the gold version, but I'd get the steel version.
Whenever anyone is considering to procure a WorldTime, the inevitable comparison with the Patek Philippe WorldTime arises. What surprises me the most is that Audemars Piguet doesn't have a modern watch with the Louis Cottier world time system. Patek Philippe is so successful with their 5130 WorldTime watch, Vacheron Constantin jumped onto the bandwagon, does Audemars Piguet have any plans to produce one and if so when is Audemars Piguet going to show the world it's version?