Bought five or six rifles and shotguns from them over the years--all at outstanding prices--as well as lots of ancillary stuff. Items sold as "new" were, in fact, new; "used" items were exactly as described.
Service has been fast and excellent, though one of the LGSs I did an FFL transfer with bitched mightily about the way CDNN shipped a rifle--in a gun box plainly marked, "Winchester." (Understandably, discreet double boxes are always preferred.) Nonetheless, I had no complaints, and would certainly buy from CDNN again.