I've played two rounds with the e6 and am quite happy with them. I am driving the ball straight down the pipe consistently now. The odd pull but that has nothing to do with the ball. As far as the covers go, Both rounds I only played one ball per round. They did not scuff at all. Also a testament to their straightness if I finished with the ball I started with. I putted very well with them too. Again, not sure if it's the ball or me but since I switched to the e6, things are going for the better