The soundtrack was the best ever, I gotta give it that. No other FF soundtrack compares.
If you don't understand the Junction system, you shouldn't be playing JRPG's. It's an extremely simple system. Draw/refine spells, junction to stat. DONE. If you don't understand, refer to the tutorial. It explains the sysem perfectly.
IX's combat was too goddamn slow, and thanks to that, learning new abilities was a huge pain. Return to the roots is okay, the world is okay, but since everyone but Vivi, Freya, and Steiner suck, it's hard to play. Remember - you have to bear with your characters all the time.