Been trying out the z-star the last couple of weeks and really liking it. I was using the QST, which is a fantastic ball, but just wanted to try something new. Distance off the tee wiht the z-star has been comparable, but where I'm enjoying it the most is on my approach shots and around the green. I seem to be getting more spin out of the z-star on my approaches and chips. My last round, I regularly found the ball was stopping no more than 2-3 ft or so from the pitch mark even on the long approaches. Ball also seems to be pretty durable, so all around a great ball.
I've played the zstar xv for awhile and dabbled with the QST.
been toying with putting the reg zstar in play, but don't like hearing it's the same distance off the tee as the QST. that's my biggest knock on the QST is distance off the tee.