Marsh,
I have the polished one, and after a drilling bungle with the first one i had, which it split the ball half way down, The second one is quite a handy ball,
The only thing that you have to watch out for is when it hits any sort of oil it doesn't come back. I recommend getting it drilled max leverage, as anything less is quite inconsistent as the pattern changes. It holds its energy very well, and carry is quite nice, with a solid hit. Not too hard, but hard enough to carry. Needs to be bowled with a fair bit to get it controlable.
May I ask which centre you bowl at?