As a seller and buyer on Ebay, I take great pride in leaving Feedback for you as my customer. I want very much for all to be happy with their purchase as well as having a pleasant buying experience with me. I leave Feedback as soon as I receive your payment. As a buyer, If  I am not particularly pleased with the item or transaction, I will always find something positive to say and I email the Seller with any concerns I might have (privately). I believe this to be the best practice.