Well, my wife, who doesn't like the Muppets at all really liked the movie and I, a lifetime Muppet fan only sort of liked it. I'm not sure if that's a good sign or not.
I wasn't as touched or excited by it as most people. I thought the first section was really good, but I thought they had too many subplots going that slowed the movie down in the middle. (The Amy Adams character seems a bit pointless and that "Party For One" song was awful. The problem for me was that I didn't connect to the Muppets dilemma because they weren't really the main characters. It was more "Jason Segel featuring The Muppets." The story seems really more about Walter with the Muppets as a supporting cast.
Having said that, I *do* like the movie. It is certainly better than just about everything they've done since Jim Henson died and I laughed like crazy more than a handful of times. However, I just didn't find it as "touching" as most people did. I'm also not a big person for entertainers/sports figures hanging on too long. I always sort of felt the Muppets hit their prime in the late 70's to the mid-80's and since "Muppet Christmas Carol" have sort of been floundering. The spirit that Henson and Frank Oz brought to the characters isn't really there for me anymore.
I know I sound like an old grump, but I guess I'm in the minority.