Forgive me, but I'm a little cynical about RUS. For the following reasons:

1) The chord patterns they give are incomprehensible, and largely useless.

2) They insist on changing lyrics to make them more politically correct. If a song is trad., that's their choice. If it is by a known author, it should not be changed without the author's express permission. Period. Nondebateable.

3) Peoples' devotion to this one book has put it in danger of becoming an entirely arbitrary criterion for whether a song is "important" - worth singing - or not. I happen to like a great many songs that aren't in the book.

I think Digitrad is an infinitely better resource. What's that you say? "But Digitrad is only available to people with computers and internet access!" Well, the rest are obsolete, and will die out pretty soon anyway.

Gawd, it's fun to be grouchy on a Tuesday morning.

Peter.