SellUsedBooks.com posts every user review.
We post every user testimonial, good, bad or neutral. We could talk about how great our service is til we're blue in the face, but we think our user feedback pretty much says it all. After all, they are the real judges of how good a job we do.
We could also cherry-pick only the best comments, like some sites, but we don't. Our goal is to build a relationship with you, our customers built on trust and quality customer service.