I saw Harold and Kumar Escape from Guantanamo after both the hype and all the grumbling from the disapponted fans wore out. It isn't a bad movie. And the problem is that that is the best that can be said for it.
The skinny on the plot: The two stoners from Jersey fly to Amsterdam and Kumar is carrying a smokeless bong so he can light up on the flight over. But an old lady thinks they are terrorists because they aren't white. Isn't that hilarious? No? I didn't think so either.
A government doofus sends them to Guantanamo where they escape in under five minutes and then head to Texas where they hope another friend in the government can clear the whole thing up.
So the best moments are when Neil Patrick Harris returns to play Neil Patrick Harris, a straight, shroom-popping, kinky, whore-seeking Neil Patrick Harris. The problem is that this was a fantastic cameo character in the first movie, because Neil Patrick Harris didn't have a career then. Now after the first movie, he's Barney in How I met your Mother and in a series of commercials making fun of his Doogie Howser persona.
The other great scenes are when the guys accidently break into President Bush's Crawford compound, where he is hiding from Cheney and getting high.
Other than those scenes the jokes fell pretty flat. See the original. It is much funnier.