There are two problems I have with this book: no fingering or dynmaics (for the piano), and very small notes. The lack of fingerings not only lengthens the learning of the piece, but means that less experienced players may have difficulty with the preludes and fugues. Also, the notes are very small - each piece is squashed down so much the notes are less than what I would call a standard size, and are pushed very close together. However, the price is good, and it is a perfect edition if, for example, you are analysing the works.