Enjoyed it, though there were some scenes that felt rushed/skipped, and are just eyebrow-raising. Nonetheless, it was a fun adventure to watch, and I loved the nostalgic references to the original movies, and sweet tribute to the original cast. It's a good sequel / transition that nicely opens new possibilities for more sequels.
Would have rated 5 stars, but Slimer being not around (or replaced with that blue metal eating version) was a bit of a bummer. Hope he gets a cameo (again) if ever they decide to produce a sequel to this sequel.