I've used it. But I'm increasingly hearing horror stories that make FB look tame by comparison.
Such as the fact that your public posts are being tied into search. So your searches are being tagged explicitly as yours, and remember you have to use your real name on Google+.
Just remember: the adage of 'if you have nothing to hide, you have nothing to fear' doesn't really ring true. Everyone should fear because very soon if things continue as they are, you will have no ability to hide anything from anyone again. Every action will be transparent, to someone. And that someone will likely be a private company that can effectively bar you at will. Not a pretty prospect, is it.