You either love it or hate it.
Even though I am 65 and people think modern technology is past me, I love Facebook. It is a great way to keep in contact with friends and relatives that otherwise might get a Christmas card exchange just once a year. Thanks to Facebook, these distant friends are a daily part of my life. I enjoy finding out what they are doing and I frequently enjoy their comments and support when times have been tough.
I have resisted the temptation to join Twitter. Keeping up with Facebook is enough.