I've been both on it and off it - came off it completely a while ago - in 2011. I don't miss it one bit. It was a great novelty when I first went on it in about 2008 - but after that the novelty sort of wore off.
I'm happy I the knowledge that the people I don't want to bother with at all - now can't find me! - I also love having the 'privacy' of not being on it!!