I watched the movie last night on Disc.
I can't say that I really liked it or disliked it. I have never really been a big fan of movies within a movie. I picked it up because of Robert Downey, Jr and he was definitely the best part of the movie. Tom Cruise was good for about 5 seconds after the reality sinks in that he is ug'd down. Jack Black and Matthew McConaughey were throwaways.
I have to say that I had a big laugh when the director meets his untimely end after his big speech, but that is the only big laugh I can remember.
One other thing I got a laugh from was actually the disc's commentary track. At the beginning of the movie there is a faux trailer for where Robert Downey, Jr and Tobey Maguire are doing a love story. The funny line being "Oh look Iron Man and Spider Man are in the same room together".
I give it 2 out of 4 stars.