This is a decent rubber for the price, which is lower when bought outside the North American market. The G1 feels fast, yet controllable and spinny. The topsheet is relatively smooth but the sponge is similar to one of a Chinese rubber. The G1 produces a lowish, narrow arc that can be unforgiving at times. It can produce a lot of spin as well as punch on the ball. The G1 is comparable to the Tenergy series.