I've gotten behind one as a friend owns one and we shoot F-class together. As far as high mag scopes are concerned, it's pretty easy to get behind, eye relief is excellent and it's easy to get a clear sight picture. Glass is clear and the fine focus wheel works very well. Negatives? Weight, she's on the heavy side for target scopes and while the turrets lock, they're also relatively mushy for click feel which I'm not a fan of. Also, there is an upgraded model due out in a few months, it has ED glass (the current model with 1/4 moa clicks does not) and 1/8 clicks making it a serious F-class scope.
I've tried one, but just briefly. Optically, it was maybe 5% better in clarity than my SIII 10-50. This is what I was mostly concerned with, ability to spot bullet holes at long distance.