Well, while its no FF7, i would say yes definately buy it. Its a top 25 game of all-time type of game so u have to buy it.
Graphics are great, music is good, gameplay is smooth, its nice and long, and the story is realllly good. Also the voice acting is pretty good.
Also, I don't have to tell u that if u have little kids, or younger siblings, u might wanna have them get outta the room while u play.(
Bottom line, Yes definately buy it, no questions, in fact its a sin if u dont buy it.