Watched both of the previous "Queen reviews" dvd's (1973-1980 & 1980-1991). They were pretty good. Not the best documentaries i've seen so far, but quite enjoyable though.
But if you're looking for some kind of extra-unique material you won't find it. Just a couple of medium quality snippets filled with hell lot of official cuts and, finally, blended with the critic review by some people (anyway, competent ones), who have almost none connection with the band itself.
All in all, - it is worth buying, 99% percent you will like it))