Fun at first but ends up being short and very frustrating at the end of the game.
You are driven along a set route in a boat or similar object, you can not speed up or slow down the vehicle you are in. Every scenery being different, from river, to caves, beach-side and so on. All done very nicely. You have the chance to re-do routes you have already done to try and get better photos than the time before, but, every time you go down previously done routes, you will find that the Pokemon and the timing in which they appear will be 90% the same every time. Sure you can try to get perfect pictures of that Pikachu that runs past you every time you go by the beach. Your photos will be graded at every intersection.
I guess it was fun even though it was short but there was one thing that annoyed me very much... To complete the game you have to have taken a photo of EVERY Pokemon that's ment to appear in the game. The problem here is that there's secret ways to make the rarer Pokemon appear, therefor you can know where it's ment to appear but not know how to make it appear. That can send you down the same route 100 times saying 'what's the secret to making that Dratini appear!!'. Without photographing every single Pokemon on offer you cannot complete this game. It ended up just being frustrating in the end, lol. I wouldn't say don't buy it, just get the outside information into the tricky last Pokemon.