Air Alert does not stunt your growth, that's just plain stupid.
I have tried Jumpsoles (imported them from the US) they are 5pound platforms which you add on to your shoes and you do their 8 week program with them on, while I may have gained a little from this program, the two bouts of shins splints and countless frustrating games of basketball I have played since with fucked shins means that I do not advocate this one. You'll just end up with shin splints.
Air Alert, I started 5 weeks ago, I imported this from the US for roughly 30 dollars Australian, so not too bad. 2 weeks in I had gained 1 1/2 inches (not sure how many centimetres that is) it's hard to test though because your legs are usually dead most of the time you are on this, you have to put up with it and wait for the results, because when you do have a few days rest between and your legs freshen up you start to feel the results. As far as I can tell, Air Alert is based on sound principals and no gimmicky stuff, be warned it is a lot of hard work, especially the second half, so if you are doing it properly make sure you do it in the off season as I am now, otherwise you want ot be finishing it before finals. My shooting performances over the first 4 weeks went 29points, 21, 17, 12. I think it's a direct effect of the exercising and getting used to it.