Have it twice for the PS2 (my old, fat PS2 had a disc drive issue where it would grind a circle into the disc to the point where it wasn't readable....in the end it took the disc with it when it crapped the bed). Had X-2 too, but the active time battle system turned me off.
Played FFX until the battle against Yunalesca I think, it's been a few years since then. A friend of mine from highschool attempted to 100% it but at that time it was impossible without the guide imo.
Wanted to buy it for the PS3 too, but not that Steam has it on sale (12,49€) I couldn't resist.
It's a bit weird, though. At the first startup I thought it was broken (clicking on "Final Fantasy X" in the launcher). White screen and when I clicked anywhere on it it would crash. Turns out it just took very long (~30sec) to load.
To quit you need to press Esc on the keyboard, there's no button for that on the controller.
It looks nice, The options menu isn't bad either. Not sure if the resolution goes higher but I think for me it's limited to 1080p (might detect the max res of your monitor).
Oh, and the game even lets you cheat (max GIL, full energy, all abilities, etc) from within the options menu.