This is the first new episode of "The Simpsons" I've watched since GABF19 "Milhouse of Sand and Fog" in Season 17. I was worried that it'd be just as mediocre as the show was back then, but I was pleasantly surprised. This is one of those format-bending episodes that I always enjoy watching, and a goodly amount of the humor connected in the way it was intended. Nothing felt drawn out, even the scenes that obviously were meant to pad out the episode's running time (the Ice Age parody at the beginning, Homer's life flashing before his eyes, etc.), and I quite enjoyed Homer's characterization - a man worried about his actions and terrified at the notion that he may have done something horrible without knowing. I like it when Homer is good at heart, and this episode proved to me that he still can be. And yeah, the ending was nothing I haven't seen before, but the humor was strong enough to redeem it.
I'm beginning to think I should start watching new episodes of "The Simpsons" on a regular basis again. I'm actually a little bummed out now that I'll have to wait for the Season 17 and 18 DVDs to catch up on what I've missed.