They are an imported disc. I use them on a day to day basis at work and get on ok. Yes, there not as good as a premium brand disc such as the Norton ones I also have but that is reflected in the price. They are roughly half the price of my Norton ones and the Norton don't last twice what these do if that makes sense! It also depends on how people use a disc, I've seen plenty of people ruin a new disc in seconds.What are the reviews like on these