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.