For fans of Ghostbusters, yes. For anyone else I would say rental. So far I enjoy it. The story is good and feels like a true continuation from part II(the movie). The game is really fun and I am enjoying it. It is a blast to hear everyone play their parts again.

They also added little easter eggs for the fans. For example, when you are in the Ghostbusters HQ, if you wander around to Egon's computer the ending to the original Ghostbusters game is on the screen. They also have Vigo's portrait and you can interact with him.

The only cons I have so far are that:
the characters seem a little stiff
the gameplay can be a bit confusing/difficult sometimes
No option to save manually
Long load times and that is even with the mandatory install.

All in all, so far so good. Worth it to me!