I just finished FFX and it was truly a very good game. Personally my favorite game of all time. Now Here's my mini-review:
Graphics:
VERY GOOD! The graphics are eye candy, especially the high quality FMVs.
Gameplay:
Pretty much standard RPG Battle system. Fans of FFVII will recognize the overdrives,they are like limit breaks. The sphere grid is also a very good idea. I like it better than the standard level up, imo. Also, Square made the game challenging but not frustrating to the point of breaking the PS2.
Sound:
Very good score as usual. Favorite songs were the ones during the
Spoiler:
Final Braska Summon Fight and the Tidus/Yuna kissing scene.

Plot:
Wow! Wow! Wow!
Incredible! I really like the badarse villains and the whole Jecht thing.Now the spoilers.
Spoiler:
Seymour is VERY evil! He destroy Ronso! Kimarhi kicked his butt! I liked the fact that Jecht was Sin and Auron was dead and the entire Yevon thing was just a screwed up thing to give the people of Spira hope. And the kiss was awesome!

Recommended: DEFINITELY!