Pro Rich experience thanks to a seasoned developer team
The Pokémon team grouped up with Nyantic Labs (creators of Ingress) for Pokémon GO. Nyantic Labs is affiliated with Google, and use Google's data to create a vast database of public areas. The partnership with the Pokemon Team allows Pokemon GO to use Ingress data to have a rich experience right out of the gate, sharing many of the same points of interest.
Pro Uses intuitive setting placement for gameplay
Pokemon GO takes place in the world around you, and invites you to go out and explore the area. There are Pokestops which offer items, and these Pokestops are typically interesting places such as libraries, churches, parks, etc.
Pokemon also typically stay in regions which appeal to them, water Pokemon show up more frequently around ponds or lakes, while normal Pokemon (Mouth, Ratatta, and Eevee) show up more in urban areas.