I've had a great time with Se Lo M'Accordo and Bransle Gay. These songs are a joy, especially Bransle Gay, and I'm starting to work through the other pieces in the book. I have listened to the Renbourne recordings of these pieces, and the book includes a free audio of 13 of the songs on Melbay.com.
I have always loved Renbourne's style and musical sense. These are not beginner pieces, and some tunings are unfamiliar. I would suggest starting out with the standard tunings and dropped-D. I made notations of the tunings in the table of contents. I'm an intermediate guitar player, and these songs have encouraged me to play more, and have improved my technique. I'm a little afraid of tuning my strings up, such as E to F, but otherwise I look forward to trying everything in this wonderful anthology.