I was using Yonex SHB 90. I had no problems at all for the first few months with the shoes, and many of my friends still wear them and have had no problems at all. But I need a lot of cushioning, so I did a bit of research and found that Yonex shoes can lose some of theirs after a few months. Now I use Asics Gel - have tried med/low end and top end of the range (Gel Blade). The cheaper version is the best for me, as the more expensive had a flatter sole for more grip, but I didn't like the fit. I've been playing with my cheap Asics for 15 months, and will replace them next week. They are not as good as the Yonex for grip, but they are good enough and don't give me problems. I am not anti Yonex at all, in fact I think Yonex probably have some of the best shoes on the market - but they just don't suit me.