Maybe it's just me, but I wasn't really impressed.
I dislike the conceit inherent to the story-that we're going back in time to season 2 to see something that we weren't told of when it happened, surrounding a character we've never seen before. I thought the pegasus scenes were disappointing. It was just taking all the dialogue from "Pegasus" and "Resurrection Ship" and acting it all out. I would have liked some novel approach on what happened on the Pegasus. I missed some of the Pegasus characters (what happened to the pilots?).
Another conceit I didn't likie was the idea that the colonials knew a long time ago that the cylons were experimenting with biotechnology, but when human-looking ones popped up they were very surprised, weren't they?
I never cared about this Shaw character because she just popped out of nowhere and was never developed much. I never felt the real impact of the horrors the Pegasus endured or why they felt they had to shoot all these innocent people. The episode didn't have BSG's usual political edge, the score didn't jump out at me, and some of the direction and camerawork felt rather heavy-handed and unnatural.
On the whole, I found the plot a combination of confusingly nonlinear and utterly uncreative and contrived. It seems like an excuse to get us a BSG fix, but that would have better been served by actually starting the new season by now. I don't like the notion of going backwards.
All that said, the look at the old cylons was fun, the effects were great, the acting was good as usual, and frankly, the world needed a BSG fix in a really bad way. It wasn't *bad*, I don't think, but it wasn't any better than an average midseason BSG episode at best. There's nothing approaching the dramatic level of Exodus, Kobol's Last Gleaming, or any of BSG's other great episodes (Resurrection Ship). Given the hype surrounding it, that makes it kind of disappointing.
I still have hopes the DVD will include some more character development and make the story more coherent.
And since when is Season 4 starting in March? And where are my Season 3 DVDs?
