I've got a few although the one I have on a 30-06 is a 3.5-10. They will be better now with the new Windplex reticle because bullet drop is only one part of the long range equation. I've had a lot of fun banging steel with them and killed a lot of animals with one mounted on a 30-06. The one I have on an STW gets me out to 800 yards with one turn of the dial, but since it doesn't have wind references its sort of dumb.
Cons; dial spins far too easily and you'd best check it every shot if you're carrying in a sling. Another is a point I've flip flopped on myself a couple of times. My current thinking is that 14 power scopes really should have an AO. With that and a hold wind reticle my main misgivings are gone.
Not to damn with faint praise, but I like the B&C reticle more for zero to 500 and prefer real turrets from 500 out.