The HP is a really great Rubber, because of its super grippy topsheet. Its good for serve return due to the lively topsheet and it has a great control and accuracy because of the open-pored sponge.The HP has an impressive durability, which is why I would highly recommend this rubber for intermediate and advanced players who dont want to spend much money in a short time. The sponge thickness is generally good and the sponge quality is really well done by andro because its in contrast to the R series much more controlable and accurate, but here comes the problem, slower. This is the only problem but if you have a good impulse and arm movement you will get used to it.All in all the rubber is really well done and I highly recommend it because of its price- performance ratio.