I've used this boost for the rubbers bought from ttnpp which is DHS 3 Nat and Nat Blue sponge especially. Definetly boosted nicely and lasted over 20-30 hours of playing, nearly one month. To be honest, i don't have much booster experience, only used this booster. Probably used 10 times at most. Still have it. After boosting, I've noticed especially increasing speed of the rubber than the spin.