Welcome to the theater of the absurd! I highly enjoyed this play, which tells the experience of two minor characters in Hamlet. I think what made it even better was that it was short enough, and easy enough to read, that I could go through the first time without worrying about what parts would tie in to the assigned essay topic (the book was part of my independent study Humanities class).
I don't really have anything negative to say about R&G. The mood of the play was great, and it's definitely something I'll read again. Rating: read Hamlet, then read this. They juxtapose wonderfully.