Excellent game, a must-have for every GBA/DS owner out there.
It's not considered a sequel to the PS1's Final Fantasy Tactics.
It takes place in the imaginary land of Ivalice, it has a lot of strange creatures, and amazing enviroments, from deserts, to lakes, forests, mountains and snowy places.
The most amazing thing about this game are the graphics, this game also has the backup of Square-Enix, which is well known for making the most awesome RPGs.
Final Fantasy Tactics Advance is definetly a game that belongs not only to the GBA's Hall of fame, but also Square-Enix's Hall of fame ;p