It depends. Have you ever played any other game in the series... and if so, did you like it?
If you haven't, then you might want to look up some reviews online. Try going through a few of them – whether the person who wrote the review bears a positive or negative perspective, all reviews are biased in some way. If the person who reviewed the game sounds similar to you or likes/dislikes the same sort of games as you, you might want to use their opinion to help form tour decision.
If you like what you read about the game, then go for it. If not, save your money for one you know you'll enjoy.
Ultimately, it all depends on what sort of a gamer you are. Listen to your opinion above all reviews – because if you really want it, something inside you already knows it, and doesn't need a review to sway you one way or another!
I hope this helped!