I honestly thought the finale was pretty fitting. I didn't really have too many problems with it. I was more worried they were going to kill every one off or just leave them lost in space. I thought it was interesting that they ended up being what present day Earth believed to be the beginning of civilization. This whole time I was thinking they were going to find Earth already in present day or the furture. I was expecting it to 150,000 years in the past. I found it to be interesting and did just what it should do which was to make people think about what was happening. The whole point of leaving technology behind is to leave behind the very thing that brought on their war in the first place. It was about starting OVER with a clean slate and a new life. The only part I really didn't feel was explained well enough was how Hera was the key to their survival, because it seemed more like Kara was the key. Even with Hera being the mitochondrial Eve, you're telling me the some 38+K survivors left and all the cylons that stayed on Earth didn't procreate and help re-populize the planet. That really made no sense to me. Otherwise, I was generally please with the ending.

Harbinger only means a "sign"; a sign of things to come. Maybe it was her own death that she was harbinger of. She did willingly let herself explode. And saying that she would bring the human race to it's end, could just as easily mean the end of their journey to find Earth. I think given the fact that she had a "destiny" throught out this whole series meant she could have possibly been an angel all along. Or maybe because she had a "destiny" she was brought back to life only in order to fulfill it.

Don't think the robots in the end were meant to be threatening. I took it more as a joke. The whole time they've been touting history repeating itself, but then head six and Baltar tell real Six and Baltar that their furtures should be uneventful. I took it more as history NOT repeating itself. Because our technology is leap years behind theirs.