I have bought from OWC many, many times in the past. Mostly, but not 100% good results. Kingston has always had a good reputation, but that has seems to have eroded somewhat, if you follow and give credence to the reports at MacInTouch. My most recent purchase was from Viking Components by way of Amazon, of all places. Viking is a major player in the OEM market, which is why I chose them. They don't sell directly to consumers. I was completely satisfied with my recent purchase.