I loved the original, but mostly just because of Bill Murray. I don't think I ever even saw the first sequel, and while I was aware this new one was coming out, I guess I just don't care much one way or the other.
I'm not sure if you were following the saga of Ghostbusters III. A few years ago, a script was actually written by the two writers from the US version of The Office. It was sent to Bill Murray but he didn't read it. Apparently, Aykroyd and Ramis were going to proceed without Murray, but the death of Harold Ramis pretty much put an end to GB3 and opened the door for a remake.
While I'm not going to see the new movie, I'm glad they decided against doing a sequel without Bill Murray.
You should check out Ghostbusters II sometime. It basically follows the same formula as the first one, but it's still a fun movie. It pops up on basic cable very very often, so it would be easy to check out.