I have the NXS 5.5-22x56 model. Had in on a Remington 308 for about 2 years now. My wallet still hurts every time I look through it, but it's been so much fun to use that I'm not about to part with it.
As said above, the glass is great. And when I adjust the elevation or windage it goes right where it should, every time. I think another good feature of these is the recticle is etched into the glass, so no breakage.
It has an illuminated recticle but I never use it. On the NXS models you have to remove the parallax knob cover, remove the lithium battery, and then you can adjust a tiny little screw for the amount of brightness you want. I think the benchrest models have an external adjustment for the brightness.
Would I buy another. If I ever win the lotto you bet I will.
ut would imagine they are superb.