The steep trajectory and power of the Sriver was legendary. The G3 FX is even better thanks to Butterfly incorporating its great High Tension technology into it. When anything touches a high tension surface, the effect is explosive and the same is true for the Sriver G3. The fact that Butterfly retained the steep trajectory makes this rubber perfect. The softer version of Sriver G3 for the post glue era offers advanced control & more ease of play.