I purchased Logic Studio from an online vendor that is well known to readers of this forum. Upon trying to run the Install disc I found that the disc can be heard spinning but after a few seconds ejects without showing me so much as a window or message of any kind. The consensus was that the disc was bad and that I should send it back. The vendor agreed and I sent it back. I asked for a replacement which arrived today. The Install disc from the replacement behaves exactly the same way. Although it seems to spin for a longer time, it eventually ejects. I'm pissed. If this is what passes for quality control at Apple, I'm looking at Pro Tools or another platform. I've been reading a lot of other people's experiences and it seems like there are plenty of similar stories.