Usually I would complain about wasting a first page on recapping previous events (especially when this is only issue 3 of 4), but I missed issue 2 so this was quite helpful catching me back up. Even though there is a lot of dialogue all discussing various ghost-bustery science, issue three is a quick read. Not a lot really happens this issue. There is one action sequence that introduces a new ghost trap, which was kind of interesting (in fact, if there was a whole issue just going through all the Ghostbusters equipment I would definitely buy it). I also enjoyed new-Ray getting slimed by the 'real' Slimer. Unfortunately, a lot of this issue is discussion with the characters taking up most of the panel space.
The backgrounds are kind of generic, which is a shame because the whole issue takes place in the Ghostbusters' firehouse. It would be nice if there were things to go back and look in detail at. They are clean and look great, it would just be nice if they had some extra sight gags or interesting things to really delve into.
The two art styles are still being rendered perfectly and look like their respective universes. Dan Schoening is doing a great job of keeping the characters different while making them still feel they are in the same rooms.
If you already read the last two issues you should carry on with it and get this one. If you were to pick this up as your starting point you might come out underwhelmed. I'm looking forward to the resolution in the next issue. Hopefully more action, more equipment and more background eye-candy.