Surprisingly good after the let down of Buzz from Google and Ping from apple. Google+ takes the good parts of Facebook and adds to them. Different circles for sharing things is neat if you dont want people from work seeing you plastered or if you dont want your parents seeing you talking about shagging. the photo system is pretty nice and you even see EXIF info and a histogram. Its non-reciprocal like twiiter; people can follow you but you dont have to follow them back, and it retains the facebook style layout but has a nice, cleaner look to it.
its a bit shit at first when you join as you have very few friends but once you get people on there it livens up
you need an invite to join - post your email here or in a message and ill shot you one.