Far better than I expected. On the surface it looked like a typical juvenile comedy. Also, it stars Jennifer Aniston, so you know it's going to be fairly shallow. However, it turns out to be hilariously funny, with some great comedic performances. Plot is decent, direction is fluid, though there are scenes which seem overly slapsticky or contrived.
Performances are mostly spot-on. Jason Bateman and Jason Sedeikis don't put a foot wrong and Charlie Day is bearable. Supporting cast are excellent, but looking at the names it is hardly a surprise: Kevin Spacey, Colin Farrell, Jamie Foxx, plus Donald Sutherland and Bob Newhart in minor roles. Jennifer Aniston is very funny in her role, as well as steaming up the screen.
Great fun.
