+1
It is nice to know when events are coming up and people, Birthdays, phone #, etc. if your phone dies.
My main reason for using it is because we have ZERO family local. Our family is spread out across the country so its easy to put up pictures of our family and events, etc. that we have going on for them to see.
I don't mind employers, etc. looking on there because if you are that concerned about it, you probably shouldn't be posting/saying it. I think people have lost touch with computers and say things they wouldn't say in person.