The Canon Refurbished people also treat you properly if something is wrong with the lens. I just bought a lens from them, which looked in absolutely pristine condition when it arrived. And, if worked fine on auto-focus. But, when I switched to manual focus, I started getting error messages. I called Canon and they sent me a prepaid, UPS mailing label to return the lens and offered me the option of just returning the lens for credit or getting another one. I will definitely buy from them again the next time I see a lens that I want.