- Are Hanon exercises any good?
- Should you practice Hanon in all keys?
- How long does it take to learn Hanon?
Are Hanon exercises any good?
Hanon exercises are great for helping you isolate particular "riffs", if you will, that are difficult to play. The idea being, if you repeat them ad naueseum, you'll be able to play them. In the end, any given Hanon exercise will be useless unless you're playing music with figures that are similar to the exercise.
Should you practice Hanon in all keys?
Yes, it is common to practice Hanon in all keys, or at least some keys other than C major.
How long does it take to learn Hanon?
Last time I did them I spend 2 months on part I, 2 months on part II, and two months on part III. It takes me about 8 weeks to relearn one of these sections and bring it up to speed. I've been playing now for about 7 plus years. Hannon has work well for an old beginner like myself starting piano at 39years old.