My personal opinion was that the interviews with the stars was excellent. All 3 stars talk very well so that was fun to watch. There is no commentary by the director. There are two options called making of and behind the scenes. Both of them had interviews with the stars. There is another section where all the promos/trailers are shown which is quite good. Then there are two songs which is awesome. There is just a mention of Cannes by the stars and there is no footage. And then there are some 30 or so songs from other movies with the 3 stars.
Anyway, all of this was discussed in detail here:
http://www.zulm.net/cgi-bin....;t=2336