My experience was not as good. I ordered a Canon 24-105 over Black Friday rated in EX condition. Everything I read basically matched what was said already in this thread, so I figured I would be OK and maybe even pleasantly surprised. (And it was a good deal with the discount - same as today.) At the very least, I thought the glass would be clean and 100% working order. The lens I got however, the grip on the zoom ring was loose (so you had to squeeze it really hard to zoom or it would slip), it was pretty dirty, and had dust/lint all over it. It was probably just an unlucky first experience with them but I opted for my money back instead of an exchange. Not sure if I would buy from them again?
Having said that, their customer service was easy to work with and setting up the return was no problem.