Is anyone using these? Would that be a significant improvement over the Yonex factory insoles in it's high-end shoe line? These would allow me to test the "insole hype" without getting ruined, but to make myself a fair opinion, I'd rather buy insoles that are the best ones or close to be the best. Are these? If I can get 80-90% of the improvement between stock insoles and the best insoles out there for 25% of the price, I'd be happy to try it out.