I agree with the others on see thrus. Weak design that is subject to moving POI's from recoil/bumps and mount to high (often causing poor cheek weld which IME effects shootability). On the flip side the see thru portion isn't great for usewith the irons.

I have variables on all my rifles and ML's, at the lower X settingsno problem with taking the in tight shots.

If your situation doesn't really require higher mag for longer shots then getting a low X variable IMHO would be a betteroption (say something with a 1 or 2 x low).