I've had two minor problems with KEH (a lens with a seized diaphragm and a Nikon F4 that ate batteries), but overall I am very happy with KEH. The prices are fair, shipping is fast, and the gear is always as expected or better. I got a 220 back for my Bronica SQ-AI recently that was EX+ rated; it was indistinguishable from new. (In fact it had a Bronica film spool in it.)