Short on time recently for a full review, so here are comments I posted last month to RPGGeek:
R&PL raises the bar for all other small-press RPG publishers in terms of content, illustrations, and layout, and as a physical object. Looking at only the PDF version does not do this work justice.
It's designed specifically for ease of play and direct use at the table. The GM is given just enough information to create adventures in the setting through the use of bullet-point lists and tables. No dense text blocks or pages of back story that must be absorbed before playing the game. Sit down, break out this book and your favorite rules system, and start rolling for months/years of play.
Even better, it can be used as a toolkit for your own setting. How to deal with eccentric NPCs, interacting with the mirror world on the other side of the Looking Glass, the 3D spatial relationships of the castle maps, mass combat methods, instant location creation... all can be drifted into any campaign with ease.
R&PL is a new and totally unique take on a classic fantasy story, with plenty of room to make the setting your own.
Adding to the above, I had been following the previews, and considering the limited print run it was a day-one purchase for me. Check it out before they are all gone.