The one I got had almost no grip when i spin the ball hold the racket relatively vertical, ball skids. Even at the first use. Crazy! It was like, as if the package kept under the sun and topsheet lost it grip... Rubber felt dead to me. I was doing full power shots, tried wrist too, I wasn't able to make the ball sink into sponge enough. Still able to play %90 percent good compared to my regular O8C.
I used 1 normal layer of Haifu booster direct into sponge, it curved nicely. Then glued again... Oh boi! I found my end game! Nice arc, not high as O8C, not low as Battle II Prov BS. It is 45€ with club sale. It feels like very well boosted, less tacky 40 degree H3neo blue sponge. But h3n looses that nice feeling after a week or so. Then you grind until the next boosting.