It's propaganda for a realpolitik point of view. They do not really take sides with anyone. My only gripe with them is that, all things being considered, and George Friedman's work having been read, they seem subtly promoting of their reasoning for American dominance, but that bent may just have to do with the way they do their best to explain why things are the way they are, rather than what things should be.
If anything, that is the reason to dislike them. Their analysis of the facts more or less ignores humanity. But to be fair to them, the world is an inhuman place to live in.
Stratfor looks interesting. I bookmarked it and I'll decide on my own if it's propaganda or not after reading it for a while.