I absolutely loved this game. The photography was stunning, it was a pleasure in itself just to walk around and explore. (There is an added feature of a guided tour, which is quite separate from the game itself.)
I thought the storyline was interesting, and the puzzles fun to solve, too. Some of the challenges were difficult, but the game has a bypass feature for a few of the harder puzzles. It's good to take notes while playing!
I would definitely recommend this game.