An enjoyable, albeit simple, look into Vaan's adventures after the conclusion of FF XII.
The game play itself is best described as a rock-paper-scissor real-time 'tactical' adventure. You play as Vaan - the up-and-coming sky-pirate from FF XII. At your side you have some familiar faces - your awkward step-sister / love interest Penelo, along with your friends Kytes and Tomaj. In addition to your old crew, a new face - Filo - is along for the ride.
All the characters in the game, both hume and enemy alike fall into 3 classes. They are Flying, Ranged, and Melee - this is where the rock-paper-scissors aspect of the game comes into play. Flying characters are strong versus melee, melee are strong versus ranges, and ranged are strong versus flying. Individual characters will all typically have an elemental resistance and weakness to further take into account.
While all that sounds like it offers an enriching tactical playing field, one soon finds out that for 99% of the game, the best strategy is to select all your units and just attack en masse. If you also take into account a relatively weak equipment selection, then the game's shortcomings come into light.
The game is not bad, so to speak, it's just rather simplistic and you find yourself playing it because the story itself is compelling. Your adventures through the sky-continent are well-paced, requiring very little experience grinding and the plot reveals build up in pace until they crescendo into a truly challenging final fight in the skies above Ivalice.
In short - the game is fun, the battle system is perfect for a mobile device, effectively breaking up the game into 10-15 minute segments, and it offers a compelling story that should keep you playing for about 20 hours before you delve into some of the end-game extra content. The downside is a weak tactical front that is best countered by select-all attack and a relatively weak equipment selection for all your characters.