I use it, but don't like it. I find it useful for remaining in cotact with friends as my email tends to block virtually anything as spam, which is why I continue to use it, in spite of my displeasure with it. I particularly don't care for frequent changes to privacy settings they make. As a consequence, most of what I post is random nonsense that I'm not bothered that strangers would know, if they're that bored and stumble upon it.
I am quite often amazed by how little thought or consideration people seem to give to what they post on their pages. Everything from grandma croaking to TMI about their health issues.