Just bought a used lens from KEH a few days before Christmas. The lens appeared nearly flawless, but had a problem internally, thus I rejected it on Dec. 23.
In one call and in just about five minutes, the problem was solved and a replacement lens was on the way and got here on Christmas Eve, just in time for my friend's surprise!
Easy and fantastic customer service, indeed!
Another time on the road, we had a camera failure and thus by calling KEH, we had a replacement waiting for us a couple of days later when we reached our destination. Another great experience from them!