I loved the trailer! But I was disappointed with the crowd reaction. It was overall good, with some laughs at Kermit's appearance and at the one-liner after Crazy Harry comes in, but I expected more (from the audience). Then the Zookeeper trailer got a big reaction, which really brought me down about their response to The Muppets. I guess I should be happy that it got a mostly positive reaction, even if they aren't all big fans like me.
Anyway, I thought it was really well-done and a good way to introduce the movie and start to re-introduce the Muppets. A standard trailer that just features Muppets from beginning to end probably wouldn't work as well.