There's not a lot of structure to the film, and Ira takes detours every once in a while, stepping outside the documentary to talk about making the documentary. It's like he added the commentary track into the film rather than separating it on its own audio track.
If you've watched all the bonus clips on all the DVDs, then maybe you won't learn a lot of new info here. But while it gets goofy at times and goes off track, it's still great to see everyone again, mostly talking fondly about it.
It's not perfect but it still made me SQUEEE and all the feels.