Saw it, loved it...although I didn't think I would like it at all during the first ten minutes of the movie....Juno's "slang talk" or whatever you want to call it seemed to be a bit over the top at first, but it seemed to tone down almost immediately.
It was a pretty positive portrayal of a blended family. There were parts where the stepmom was very much "mama lion" and it was nice. There were also parts that mentioned things she had to give up in order to be a part of Juno's family...which I thought was accurate and realistic. It wasn't all hearts and love, it seemed to be an honest depiction of a step family dynamic.