Recs.
Updated
SpecsUpdate
Pros
Pro Cell phone controller
Instead of pausing the game for everyone while you adjust your character, this can all be done on your phone thus allowing the game play to continue. You also don't have to have multiple controllers on hand as anyone can download the app to their phone and are ready to play.
Pro Individual storylines
This game is made for co-op, definitely not single player. Each player has their own storylines though (on top of the main quests) that are private to them. Sometimes players can have secret quests that are competing. How much information you choose to share with your allies is up to you. This style of play is only possible because of the cell phone controller mode.
Pro Use your cell phone as a controller
Instead of pausing the game for everyone while you adjust your character, this can all be done on your phone, thus allowing the gameplay to continue. You also don't have to have multiple controllers on hand, as anyone can download the app to their phone and are ready to play.