I really wasn't looking forward to this episode - just another continuation in the Skinner-Krabappel soap opera storyline. However, it turned out to be quite funny. Not a great episode, but decent nonetheless. The opening was pretty good and the episode progressed well.
I thought Edna falling for Comic Book Guy was a little out of place. Although the reasons were obvious, I just think it should have been a different character because CBG has been used too much recently, and also once with a love interest (Worst Episode Ever).
Another thing which I disliked is the rushing of the Homer-Marge subplot. Little hints were given throughout the episode, and it would have been nicer to have a proper conclusion to this. I did like how Marge brought the subject of whittling batteries back up, though. Homer's "second" marriage to Marge (which is actually the third, cf. A Milhouse Divided) was way too rushed and pointless.
Oh and finally, Matt Groening's appearance as the creator of Futurama was great. It was quite short, but they managed to fit in some great jokes about him, such as Milhouse mispronouncing his name.