Every version of the 5131 is a great. This P to me with the view from North Pole is an excellent depiction for the last version of this series. The bracelet was unexpected though.
When I handled this piece at my AD, I LOVED the heft of the platinum bracelet (just like the 5711 40th anniversary), even though I would have been happy with a normal blue or black leather strap. Was the bracelet specially designed for the Arctic map to match its temperature and ice as others suggested? I think only the Patek can answer this question. I think it might be a combination of design and pricing.
Quite a few big collectors have told me that the P is THE version to have because of the platinum case and bracelet.
As I said previously, upon examining the P at my AD, IMO the craftsmanship is comparable to the G and R but no better. Perhaps my feeling is due to the fact that the North Pole view entails fewer colors and hence less of an opportunity to provide color gradations.
Cheers,
Gordon