I just saw BATTLESTAR GALACTICA: THE PLAN, and truly enjoyed it.
There will be much more to say after the DVD and BluRay hit stores on October 27, but for now let me leave it at this: Anyone who ever felt intrigued by Cavil, Boomer, all the various *real* Sixes, and the other "minor" cylon models, will find plenty to enjoy in this film. Anders gets a surprising amount of screentime. There is a very enlightening moment with Leoben. As I hoped, we get a few memorable doses of this new Six. The Cavils -- and really, the cylons in general -- get the coda I always thought they deserved. It was big frakkin' fun to see great moments from seasons one and two woven in. Gods I didn't realize how much I missed you, BSG.
The whole film is cleverly reverse-engineered to keep asking that first question from the miniseries: "Are You Alive? Prove it."
ETA: warning - readers are posting spoilers in the comments on this post.