I absolutely loved Final Crisis, but Final Crisis Companion was a big disappointment. One of the reasons I bought this was from Amazon's description, which says, "Superman explores the infinite secrets of the Multiverse and teams up with alternate versions of himself to battle a mammoth evil in a story from writer Grant Morrison (ALL-STAR SUPERMAN, JLA) so thrilling it includes 3-D pages and glasses!" Maybe I just got a defective copy, but this certainly wasn't included in mine. Anyway, be forewarned! If you're buying it for that story, you're going to be seriously disappointed!
Instead, it includes the first issue of Final Crisis, only in black & white, without text. If you've already got Final Crisis, you've got the same thing in color, with text, so this is pretty superfluous. Afterwards, you get "director's commentary" by JG Jones and Grant Morrison. This offers some nice insight, but they only talk about the first issue. It would have been much better if they'd looked at the whole series. On the plus side, it does provide some nice closure around the Martain Manhunter's death that was seriously lacking in Final Crisis. The other two stories are entertaining, but nothing amazing. Overall, this feels like the extras they slap onto the DVD they rush out right after a movie leaves the theater, instead of the Deluxe 2-Disc Collectors Edition. There was so much amazing stuff in Final Crisis, so many ideas, events and characters that could have been explained more and expanded on in a companion volume. Unfortunately, this isn't that companion volume.