The interface is beautifully clean looking and it's really easy to set up different circles to keep people organised into groups. I've found lots of people I recognise, but instead of having to "friend" them, you can just "follow" if they're someone you don't actually know but think you might find interesting. It definitely works much more like LJ in that respect.
Of course now I need to decide how to use it. Long posts obviously still fit best on LJ and short things on Twitter. However, Google+ also lends itself to short posts, though it's fine for mid-length too. It's so complicated!