Positive feedback - 100% satisfied
Negative feedback - you got hosed - payment not received, or item not received. Reserve this for crooks & cons.

For everything else, I'd say leave a neutral with a brief explanation of your concerns.


Before feedback, I'd do my best to get in touch with the seller and see what he/she is willing to do to make things right. I'm pretty sure eBay has some sort of counselling system to help you out, too.