I was so disappointed in Pineapple Express. It's like, fine, but the red band trailer made it look fantastic, when actually it pretty much featured all the best bits.
also: James Remar! But you're right, I'd never noticed the similarity before.
I thought the trailers made it look only marginally funny, but I found it to be actually quite good. There were a couple gratuitous "frat boy humour" scenes, which took it down a few notches in my book, but it was way better than I was expecting.