I found the "it was as promised" reviews quite helpful when I signed up, as I was pretty paranoid about sending not insignificant amounts to Users who might only exist in a forum. I've since learned that this place is pretty well policed by the members in that respect so I had nothing to fear, but it was nice for an early confidence build. The bit I like to try and get across in a praise is not so much when something has just arrived as promised, but when the trader has put up with my daft learner questions, which they've heard a millon times before, but they have still come across as genuine and helpful.
You can tell by their wording if someone just wants you to get buying and shut up, or is happy to help. So far I've had faster and more friendly responses to enquiries here than in places like amazon, and shockingly in plenty of real shops (take note Travel Agents!). Perhaps this is because the traders on forums are their business, but in many "real" shops the customer facing staff aren't neccessarily bothered what impression you take away from an experience.