It is perfect for an animal lover like me, the game demand a true consideration for the well-being of the animals to be good at the game (even though sometimes we just don't know why some animals are stressed).
The building system allows us to do whatever we want to do but it has a steep learning curve.
It is a perfect game to just launch and chill when you don't feel like doing anything.
Do I really need to talk about the graphics ? I don't think they can be more beautiful and appropriate to this kind of game.
I have just some little cons that I did find during my hours of playing : the character's creation, the roads and the monorails. The first seems a little dull and limited (even though it doesn't really matter in the end), the second can be counter intuitive (like, why can't I just remplace the road that I've just deleted ?), and the third is just painful to connect to the roads.
I strongly recommend this magnificient game.