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What i do not like: - the song goes to beginner mode everytime you start up again - you can not change the speed before you start to play - if you want to change the speed during the song, i get the metronome instead of the percentage for speed. Have to click a couple of times because of that... - the black notes have a bubble and a small tale. Not very obvious how long you have to play it, because it looks so different from a white note from the same length... Bye, Linda