8 out of 10 N L Good Points+ I had to play two of the pieces for an exam, and there is quite a variety of pieces. They are good for improving technical skill as well as noticing fine details - The pieces are rather boring without any expression and dynamic contrast etc. Bad Points− The cover of the book is not as shown on the picture - It's almost completely a metallic grey. Also, it says 48 etuden, but there are only 24 pieces. Confirmed purchase: 22 October 2015 Published on: 01 March 2016 Irene , Musiroom Customer Service Dear Customer, Thank you for your feedback. We are sorry to hear you only have 24 pieces and not 48 etuden. Please email us at firstname.lastname@example.org and we will be happy to help further. Kind Regards, Musicroom Team.