In Lesson 13 which concerns practice time it advocates up to two hours a day practicing techniques such as scales. I'm pretty sure if I practiced one scale position up and down for two hours straight I'd go nuts as well as getting some sort of repetitive stress injury. On the other hand, if you practiced that pattern exactly once per day and filling out the two hours bouncing around with every technique exactly once you won't get good at any one of them. Myself I might practice going up and down a particular pattern maybe 15 or 20 times, then ascending and descending by triads a few times, then some sequences. After 15 minutes on that particular pattern I'd change to something different such as three octave arpeggios or something and then followed by a different pattern, but the whole process still seems awfully slow, as in several months to get 5 patterns down. Thoughts from more experienced players would be appreciated.