I just demoed the 2 ball odyssey. re: technique - the belly and upper body turn back and through together - this takes your arms and hands out of the swing. I had a hard time with it. I found it really hard to judge speed and my lower back hurt because it forces you to lean foward a bit more than I normally would. Not that this is bad, becuase it does keep your eyes over the ball.The other problem is that the putter itself is heavy and I carry my bag alot. I think if you work with it the basic concept is a good idea.