Google Reader

I must admit that I've got a bloglines account and at the moment I prefer it over Google Reader. I'm still trying to figure out Google Reader. It seems to always try to pull back all the posts instead of only showing you the stuff you haven't seen. Bloglines just pulls the new stuff and provides a way for you to pull back more stuff if you want. My only grump about Bloglines is that they need more servers (which I think they got), because sometimes I can't get in. Help on Google also isn't very informative.