An under-rated rubber by this rating- speed/spin ought to be 9+. After reading positive reviews about this rubber on several websites, decided to give it a try. Glued this to a very hard/stiff blade (no speed glue). Pleasantly surprised by its capabilities. Semi-hard sponge but lightweight. Topsheet has great mechanical spin but is not sticky and is very sensitive; feels like a screeching car tire while looping. Everything about this rubber is crisp - sharp spin, sharp speed and probably in the same class as Bryce. Loops well at the top of the bounce. If you're used to Mark V rubber switching to this requires minimal adjustment, but moving up a notch in speed/spin capability. Also the rubber gives the rated speed/spin on all types of blades. To sum up, a versatile rubber that can do pretty much everything - slow loop, smash, serve, loop against backspin, counterdrive. Compared with Mark V, the tradeoffs were the muffled sound Mark V is well known for with the clicking sound fo Mendo MP, and maybe soft pushes close to the table. IMO, the ruber maybe best with an offensive blade with high control. Would recommend it.