Part of their 2011 line up Callaway introduced the Callaway Tour i(S) golf ball along with the Tour iZ, Diablo HT. What sets the i(S) apart from other golf balls is the technology, Callaway uniquely designed this golf ball to perform better. A HEX dimple design to reduce drag. A dual core improves both distance and control. A urethane cover is what gives the ball that softer feel and better spin.
They had great response and spin. Overall we would rate these as a solid performer. Definitely a soft feel at impact but your still able to get that good distance off the tee. Works great around the greens doesn’t scuff up too much. Comes off the putter face quickly. It’s most similar to the ProV1 with a bit less spin off the driver and long irons but still very responsive around the greens.