They kind of have a reputation for bad customer service, and some have reported problems with them. There aren't many dealers, and few places carry them, so this may say something. On the other hand, I've had one on my .700PSS for about 6 years with absolutely zero problems. I have never had it loose zero, I find the dual reticle "one-shot" zero to work well, I like that as you decrease the magnification the graduated reticle disapears. I haven't had chance to shoot at extended distances with it, but have taken more than my share of deer with it at various distances. It works for me. I do wish it had an internal level and lighted reticle. It also isn't the brightest glass I've ever used. Had I to do it over again, I may would still buy the Shepard. But then again I may just go with a good tactical scope with target adjustment knobs for elevation and windage, and click to adjust for drop at distance, etc.
hershey