I just notice that Matt Rassmusen of Rose of Jericho did a review of RS 8 months ago. It's in 3 parts: Part 1 - The Game, Part 2 - RS As a Learning Tool, Part 3 - RB3 vs. RS and Final Thoughts. (I don't know how I didn't see this before; I'm subscribed to the roseofjerichoband YouTube channel).
Matt previously posted an excellent 3 part review of RB3 Pro Guitar and the Squier Guitar and Controller. His band, Rose of Jericho, has 9 songs in RBN and 6 published albums available on Amazon, iTunes and elsewhere.
EDIT: There are a few things he criticizes RS for which have changed since the review (5 lives and no control of difficulty in practice modes) but he's inserted little text pop-ups to state that those things have changed.