This Is the End is a slapstick comedy where fun is based on basest human behaviors.
The good. Incredible special effects. Constant ridicule for maximum laughter. Interesting story with an awesome end and some twists. Well paced scenario.
The actors. Although I like Seth Rogen and Jay Baruchel a lot, I think James Franco here has the best performance.
The bad. Very simple and linear story. No smart jokes.
The ugly. Danny McBride as his character is incredibly annoying.
The result. Don't expect anything intelligent and you'll have fun.