At first I was impressed with this book. Great price, both books in one, fine spine, notation not too small either - and of course the music itself sublime. However after learning several pieces, scouring their details and listening to great performances (favorite so far is Schiff)I can say that while the majority of the notes are correct, there are many errors. This is not what one would expect from any sheet music, let alone that of some of the most important music ever composed.
Seeing as there are many other editions out there (and Dover's is a similar price) that won't be riddled with mistakes, I would recommend any of them. Avoid if you are serious about playing these pieces.