Guitar Burning Speed has been revised, re-written, had lots more exercises added, videos recorded, video timer for the workout produced and a lot more.
But as speed is only a small part of what makes a guitarist...
All of the other components were added into a huge course designed to make you a complete guitarist, with a big focus of course on giving you the ability to play guitar very fast.
This new course has been growing exponentially since it was released, and there are no signs of slowing down with more and more lessons added each month.
That is an online guitar lessons course called Guitar Mastery Method