My experience with FB has been both positive and negative.

I was contacted by my sister through there, and she had been out of my life for many years prior. That was very positive for me ~ except it brought up a lot of rough memories too.

The negative is almost everything else about it. I avoid it 9 times out of 10. But every few months I'll respond to something. The FB site is the only contact that I have with any of my family. I'll leave it like that ~ I need that emotional & physical space.