Ok, I don't really like strategic games, but I tried it out cuz it's FF...and I have been amazed!!!
Apart from the plot (criticized by many but I think it's nice), the game is pretty good in graphic (as good as it can be in a GBA game), and the music is nice too.
The gameplay is easy to master, even if in the beginning it can be fairly complicated to get over all the jobs and the abilities (in fact I needed a guide to get it well).
Anyway, once you got how you can unlock new jobs through the use of weapons and armors, everything becomes even more addicting :D
There are 300 missions (more or less), the good part of them becomes available once you have ended the game once.
There are a bunch of secret characters that will join your clan, as well as a lot of stuff for the equipment, and every race (human, nu mou, moogle, bangaa and viera) has some particular job (you'll find out later in the game, the unlockable jobs are very useful and cool).
What else to say?...If you like FF, and a FF completely different from the "classic" FFVIII and FFX and FFIII, and still a game with the whole magic and fantastic atmosphere of FF...try out this game!
[Of course, go and read some reviews around the web to make your mind clearer, and on YouTube look for some gameplay video].