Saab
when you say "sign up" do you mean to their "family shield" project? Those are the very servers that I listed - you can access them without signing up
You CAN do more by using their "normal" servers but (at least the last time I looked) you needed to install some of their software and thats just another layer of complexity you don't need
Plugging in the two "family shield" servers addresses into your DNS resolution "just works"