It's a cool reticle and system IF you take the time to play with it AND you're diligent about shooting at the right magnification. Once you get on the ballistic calculator, you'll find that the default "sight in" yardage is 200 yds. Go thru the steps with that default, let the program give you the optimum magnification range to shoot at, and then jot down the point of impact distance calculated for each of the holdover lines. Once you've done that, you can then go back and change the sight-in distance (I do this in 5 yd increments) and get the calculated point of impact distances even closer to the stated holdover lines. The more accurate the info you feed the ballistic calculator, the more accurate the holdover lines work in the field.
Meopta offers the same thing (they call it the "McWhorter" reticle) on their MeoStar 4-16x44. I think that reticle layout is a little better (cross-hairs and hashes aren't quite as heavy as the Z800, so it should work better as a dual purpose hunting/target scope than the Zeiss) and the ballistic calculator works the same. One of my Zeiss scopes has a Rapid Z reticle (I love it) and I'm in the market for another, but I'm trying the Meopta this next time around for my 6.5 Creedmoor. Swarovski and Leica have similar offerings (BRH and IBS reticles, respectively) but they don't seem to match up ballistically as well as the Zeiss and Meopta...