Hi 2211,
I personally believe it's a good thing to use. Just read through it and go in the aircraft and try it for a couple of times and see for yourself.
I guess the best way to describe it is that it takes the guess work out of the equation. If you line yourself up on a 4 degree descent path (if you are flying something GA like a C172 or PA28) on final (eg, 550ft at 1.3-1.4nm from the threshold) and use the techniques of Jacobson flare, you should have pretty good landings.
Hope that helps and happy landings.