I have played with it and the g-core shaft from McDermott. I preferred the g-core shaft over the i-pro shaft. The i-pro shaft is heavier. I quit using both for my old maple shaft. I am done using the low-deflection shafts. I used the g-core shaft for many years and then went to the i-pro but after a few months just went back to my regular maple shaft and have been using it the past two years exclusively. I just couldn't get adjusted to the i-pro shaft and after readjusting back to my maple shaft, I just don't feel that the low-deflection shafts gave me the additional accuracy or feel for which they are intended. Just my two cents though.