This is truly such an amazing game. I still haven't made it more than halfway through yet, but I will finish it eventually. I started it when it first came out, but had to beg my ex to play and ultimately she didn't want to continue so I just left it in my library.
I have since found somebody who is just as video game-crazed as I am and we have been having an absolute blast playing this game together. We are taking it slow and spend maybe 2-3 hours/week playing it together. It's some of the most fun I've had with a co-op game in a very long time. The fact that it is now included with the PS Plus Extra catalog really is a big deal.