I purchased his program. It's not really a 4 year program. There are 15 levels depending on your access to weights (2 BW levels), flexibility (passing 2 'tests'), squat and your vertical to height ratio. Each level has 3 4 week phases followed by a week of rest and testing. If at the end of a phase you test out of that level, you begin the next phase in your new level is (e.g. at the end of Level A Phase 1 if you test into Level B you begin with Level B Phase 2.) I personally think it's a solid program and have recommended it to others.
I can't comment on how much it helped my vertical since I never did before & after vert measurements and my legs were very overworked with basketball leagues at the time. I can say that I got my highest leap on a dunk ever in while I was doing this program (clean dunk with the ball 1-2in above the rim...~35in vert for me I believe.) Once I start back on it in Feb/Mar I'll be sure to take some measurements.
