One of the major issues when it comes to picking consistently, quickly, and across strings is pick depth. All too often I see circular, dipping movements where the pick must travel across a considerable arc just to pick on a single string.
Just The Tip (JTT) offers a progression via a series of decreased pick depths.
Another important feature of the picks is the extreme level of grip. Grip on guitar picks has always been bad (for the most part) and this has resulted in tension in the picking hand to stop the pick slipping out of the hand or rotating.
The grip on these picks allows a natural thumb placement and so much traction that grip can always remain loose. This decrease in tension will prevent fatigue, and more importantly prevent injury.
Includes the 4 picking workouts PDF.