I don't have any of their riflescopes, but several sets of rings. The first set has been great so far, but I broke those from over torquing them to the base. With PRW rings, the screws can shear at or before 40ft/lbs, which also bent the side lugs. The correct answer was 22-24 ft/lbs to the base, same as the ring tops.
CS was great though, and got me taken care of (when I called to see if I could buy another set of screws, before I noticed the side lugs were bent).
Have replacements mounted now. Equal fit and finish. One concern from a 30mm 4th set; the screws were tight from the factory, very. It probably took 50ft/lbs of pressure, or more, to crack them loose on the ring tops. I hope it didn't mess them up.
My opinion of Leupold; really good products and CS. The QC has been there on what I've used. Many negative cases are just one side of the story. When people feel cheated, they go straight to the net to tell everyone how they were horribly wronged. Sometimes it's true, but far from always...