Buy it. The game doesn't take much time and is very good. There are few reasons not to pick this up.
Was worth the ~$10 I paid for it, but I'm a big resource management nerd. You have to like the genre, like challenge, and even then, you'll only get so many hours out of this thing.
Buy it. Play it. Get good at it. Then go and buy Dark Souls and Demon's Souls. Playing through Dark Souls 2 is easier than the others, but will prepare players for some truly great games. All while being a thoroughly fun experience on its own.
Game Strong. Solid JRPG experience, and one I didn't mind putting 90 hours into. If you like JRPGs at all, you'll like this one. It won't be your favorite, but it'll be one you'll keep on the shelf afterwards.
If you've any interest in game's as a narrative medium, buy this one. It won't satisfy the gamers that are looking for "twitch gameplay" (Like an FPS), but it's right on the money for everyone else.