I have the 16x18 string pattern and all I can say is awesome racquet for the arm. I usually can't string up full poly on any racquet I have demoed in the past but this one is amazing. I think I can probably even use Alu Power with this racquet. I am still testing out which poly string goes well with this racquet.
It is just that soft on the arm. I still have some issues trying to get use to this racquet. It requires a totally different swing path than my PSTGT.
You really need to generate a lot of topspin by brushing up on the ball. Otherwise, it has a trampoline effect if you just try to hit line drive shots. I do love how I can keep the ball deep at the opponent's baseline.