essential training manual in the piano

I think this product is not to advise any beginner. But after a year of piano, it helps to train and have more dexterity. Personally, I do some exercises before working Virtuoso Pianist my partitions.

This manual lacks some explanations before each exercise and when uncovered the first time, we are a little confused and it seems complicated to decipher. It is not at all playful and seems daunting for a young puplic. I think it should be used with the help of a teacher.