I am using this in a VCore 100 as a senior 4.5 level player. It tames the launch angle of the racquet with great pace on the ball from a soft poly. I have had both tennis and golfers elbow and this seems quite compatible for me.
I've been using this for about a month - I tried the previous version but felt the sweet spot wasn't big enough - this Flex though has so much pop and really feel like the sweet spot is the entire face. My new main and so glad Diadem got this one done!