The Student Council Saga
The first disc has the clean opening and closing, and these are always good to have on hand.
The second disc has a series of Japanese TV spots for the remastered editions, and these are amusing, albeit that the 30 second TV spot contains slight spoilers for the later episodes.
The third disc has an extra that I’d really like to see more of: the full length music video for the opening song Rondo – Revolution by Masami Okui.
The real prize is the liner notes.
This is a quite substantial booklet  featuring details that are relatively rare in my experience. The booklet includes episode commentaries by the director Kunihiko Ikuhara, a discussion of the opening/closing animations, interviews with the staff that remastered the audio/video, an art gallery and a couple of other bits and pieces.
Even if you already own a previous edition  of Revolutionary Girl Utena, the remastered edition is worth the price of admission just for the liner notes.
The Black Rose Saga
The first disc has a set of animated art boards that illustrate the setting of Ohtori Academy that would make a decent screensaver, and a TV promo from 1997.
The 2nd and 3rd discs have an interview with Kunihiko Ikuhara in four parts. This is OK, but not great. It certainly doesn’t bring the sorts of insights that the interview on the Haibane Renmei discs did.
The Black Rose Saga has an even more substantial set of liner notes than the Student Council saga. I’ll be honest and note that I haven’t been through this booklet in detail, but there definitely seems to be some depths worth exploring later.
The Apocalypse Saga
I’m going to defer commenting on this for the moment as this set includes the movie and several extras related to the movie. I haven’t seen the movie yet, and I’m reserving that for one of the Twenty Days of Anime Movies slots.
There is a booklet, and most of the extras have been moved to a separate disc rather than being split across the individual episode discs.
So stay tuned for another post on this once I get to the movie.
The Nozomi edition of Revolutionary Girl Utena is well supplied with extras, particularly in the liner notes, and Australian fans of the series should definitely be acquiring this version.
 I know a number of Australian fans who prefer to support the local companies, and who don’t buy overseas editions as a result. I tend in that direction myself, but will order internationally when I don’t think a local release is likely.