Here's my problem with the demo program...too many variables. I take a 5/8 grip and the demos only go up to 1/2. Then there's the string tension. Are all racquets strung at the same tension, somewhere in the middle, say 58? And if so, how many people play with each racquet before I demo it? This will of course change the tension of the strings. While I realize the demo program is the best way to get "a feel" for future prospective purchases, I'm not sure it is worth the time and money invested. Cheers, E.