It is an amazing watch. As Nicolas mentioned above, the depth meter is rare (only three manufacturers I am aware of make an all-mechanical depth meter wrist watch), and there is no other that combines the second time zone with the DM, again as far as I am aware. It is a massive watch, but it wears surprisingly well and is comfortable. The meter on the one side and the compressor crowns on the other side actually help to diminsh the appearance of the thickness of the watch, which is really nice on a piece this size. Some of the other divers in the JLC diver series do suffer form the so-called "tuna can" appearance, and this one does not. Needless to say, it operates as flawlessly and accurately as other modern JLCs do.
The watch is built like a tank. I truly feel like this is one tough watch. The click of the bezel is very certain, and the overall construction of the case has a very industrial feel to it. The dial is a marvel of three-dimensionality. It gave me a lot of pleasure to gaze upon the dial. In spite of the additional time zone, the dial is very legible and time reading is very easy. I think the watch was designed to function for its obvious intended purpose as a diver, but also as a travel watch for a diver that seeks adventure around the globe. Quite frankly, this is THE JLC Diver to have, so I can totally understand why you would want to add this to your already impressive JLC collection. Honestly, I think it is in a different league than the Sea Dweller, but new, it also comes at a much higher price point.
The titanium bracelet is wonderful if yo want it. I think I would have preferred the articulated rubber bracelet, but since you already have that on the NSA , I can understand how you might want the metal bracelet.
The reason I sold mine, in case you are wondering, is simply that I intend to keep a very small collection of watches, and I was having a hard time fitting the Pro Geo within my small set of watches. Nevertheless, I have not written off buying it again some day.
I would say if the price is right for you, get it!!!
Best,
respo