I bought 40 dvd's off of powerdvdstores and quite a few were defective. After a couple of emails the wrote me back telling me their masters were the ones that were defective and they couldn't send me new working dvd's. So they offered me a refund. Well 2 months later they still have not credited me with my refund. I have written them numerous times only to hear back once or twice saying they are checking with accounting.