I have been doing a lot of experimentation with strings lately. I love Luxilon Big Banger ALU Power, but was trying to find something that played just as well, but was cheaper. I tried Luxilon Big Banger Original, Klip K-Boom, Unique Tourna Poly Big Hitter, and Gamma Zo Life. I strung all at the same tension (61 M / 59 X) and always had a raquet strung with ALU Power to compare. 1) Unique Big Hitter - Had excellent power, control, and spin when freshly strung. Became a rocket launcher with no control and little spin after just a few hours of hitting. 2) Luxilon Big Banger Original - Very spin friendly and low powered string. It didn't have enough power for me. Has a spongy feel. 3) Klip K-Boom - Close in power level to ALU Power, but I got much less spin with it. Has a nice soft feel. 4) Gamma Zo Life - Absolute rubbish. Has zero power and spin and vibrates like a jackhammer when you hit the ball. Bottom line: When played back to back with ALU Power, none of these strings really come close.