I love the Rapid Z. I have the varmint which goes to 600 yards, and the 1000 yard one for my .308 rifles. I haven't had a chance to test them past 200 yards yet. Which is a shame. That being said they are right on at 200 after sighting them in for 100. So far looks good.
While I'm a fan of the MP-20 and have ordered a number of these on Falcon scopes. I prefer the Rapid Z reticules overall.
A couple of things to be aware of with the 1000 yard Rapid Z
1) with a 20 moa scope rail, you may run out of down moa to line up your 100 yard crosshair (It's the one at the top, not the centre)
2) when they bore sight your rifle most shops will sight it for the centre which is the 500 yard mark
3) when you lend it to a friend, they generally completely miss the first shot (Since they'll use the centre crosshair)