I've only got the older and the newest Leupolds. The new FXII, 4X is really impressive, especially if you need to shoot quickly from an awkward position. The eye box, i.e. the fore and aft leeway it allows you is very large.
It's very bright and can be customized with all sort of things.
Ray Atkinson claims it, along with the older 3X and 4X Leupolds, and their 1.5-5X20 VXIII hold zero after being impacted better than anything else he has tested. I can tell you mine has been literally slammed to the hard, rocky ground more than once and held zero perfectly. E
