Ebay style feedback, wouldn't work....Why???
Because it doesn't work on Ebay, a lot of professional suppliers will not leave you feedback, even if you have paid immediately, until they see positive feedback from you. Only when they see positive feedback from you will they do the same, the inference being that if you give negative feedback they will reciprocate, if you have 100% feedback rating you don't want to wreck it so you just dont bother leaving negative for them.
And then you get the people who, rather than emailing a firm on ebay to try to resolve a situation, instead leave negative feedback for the firm even if the firm would have sorted it out for them.
Alex