I bought a little over a month ago 100 princo 1X non-printable disks. Burned fine, played fine, for about a month. Then, one after the other, major, major problems. I mean, the surface is mint, but they will not read, ni matter what i try, dvd-reader in my pc or in my standalone. Yikes! Be Warned! I bought these from canadacomputers.com and were told they were great disks. No! Watch Out! I should have listened when all you guys suggested ritek. Just got a 50 spindle of those 2 days ago.