Great fan service, but...
Ghostbusters is a really good game for fans of the property. When I was playing through I wanted to keep playing, not being able to wait to see what was going to happen. Then it ended. Quickly. And I was alright with that. That is one of the things I liked about the game, it was just long enough for me to not get tired of it. The story was good at first, but then made some weird turns. The game is fun, but then gets to be a chore. Six to seven hours later, you can start a different game, but still be satisfied with this one.
If you like Ghostbusters, at least rent this. If you don't like Ghostbusters, don't bother.