I finally saw this yesterday and it was actually pretty good. As I think was stated before, it was broken up into three shorts, which helped maintain the feel of the originals. The actors all did a very good job of impersonating the boys. Many of the usual gags were recycled, as they always have been, and there were a few new gags that were more modern, yet still consistent with the original. There were a couple of scenes that went too far into gross-out humor territory, I thought, but they were only a small fraction of the movie.
Basically, it was a good-hearted homage to the Stooges. It was pretty much what a movie like this should be-- consistent with and respectful of the original. The people who did it obviously care and knew what they were doing.
There was just one disturbing part. After the story had ended, there was a two-minute disclaimer showing how some of the stunts were done and warning kids not to hit each other with sledgehammers and stuff. I'm not sure if this was supposed to be a joke or if it's just another symptom of how hypersensitive the culture has become.