i have played hanon 1-60
i agree that hanon is a powerful tool in developing the necessary finger dexterity to play at a high level.
let me tell you how i used to practice them
i would practice ech new exersise each day before practicing my scales
before learning the next hanon
for example week one hanon one
week two hanon one and two
week three hanon one two and three etc
always the one just learned repeated 4 times
i had great success with hanon i developed very fluid runs and my melodic playing became very clear
Then i discovered pishna
i found that pishna offered everything hanon did and more
the hands play different note blues so there is a coordination component
the exersiseds are all transposed with fingerings unlike hanon whose transpositions wind up making the fingers play some strange configuratiosns
over all i think pishna is the better way to go but if i had my way my studentsw would learn hanon 1-20 then cvommence with pishna little 48 then do hanon virtuoso and transcendent exersises then graduate to pishna 60 (written in 32nd notes)
they are both good and it realy is up to you and what you are looking to accomplish hanon is great for developing strenght and technique and it is easy to learn them
pishna is better at developing you for church ministry because you are transposing immediately
try both but dont shirk either one in other words dont just bounce back and forth if you start hanon you should work the twenty exersises at least and it would be better to work at finishing the book. like i said it is no rush just make it your warm up thats really what they are for. God Bless