I love how the app is designed, but the notes recognition is not that good comparing to other apps (I’m especially surprised when it some to simple single-note sounds), so then you’re disappointed with a poor score.
I like how you display the duration of each sound and how the songs are segregated.
I don’t understand though, why you ask about previous experience, if you can’t skip beginners’ lessons (or at least I haven’t found a way to do so).
I would love to pay for it, but I’m waiting for improvements, there are better alternatives on the market atm.