I'm 15 and a member. It's absolutely amazing. I can always go in and get support from kids my age who are going through the same thing as I am, and it's great because you can't always talk to your healthy friends about it - they just don't get it. But everyone at SBW understands.
Yeah, vivendi is mentioned a lot, because they are sponsoring it, but that never really bugs me - I don't even know what vivendi is - I've never looked into it.
As far as safety goes, you can give out your information- facebook, email, even phone number, in a whisper or private chat or private message. But really, you can do this in many other ways on the internet. And we're teens, we know how to be safe. And through the registration process, they eliminate all the creepers. You gotta be legit to join.
It's great - I especially love the live streaming chat - I can talk to teens like me anytime I want to. And, good news, parents! There is an adult moderator in every chatroom making sure everything is rated PG and everyone is playing nice. :) Safe, supportive, and fun.