Thanks @dingyibvs – Im thinking mine are probably approaching 100hrs maybe 80-100 (probably need to keep a better record! )For me after about 100 hours there's some slippage with more brushing shots. I clean the topsheet with the Paddle Palace cleaner regularly, a few times per training session or after each match, as the slightly tacky topsheet collects dust/powder easily. I use the Yasaka adhesive rubber cover when not playing. The sponge still feels OK. I'll be changing to a new one soon so I'll have some more comparison.
I am intrested in trying either Stiga Dragon Grip or Rakza Z EH/H on a spare blade - but hoping they are closer to D09c than K3