These CD-R's are 99% error-free. Some errors might occur if you are over-burning more than the capacity or if your software has an error.
The only problem is that the silver might peel off and it's not a good idea to put CD covers because CD-Rom drives would have a hard time reading them. With a CD cover:1. After 40 minutes, my DVD-drive fails to read the CD.
2. My CD-RW drive won't read the CD after 50 minutes.3. In a laptop drive, the CD makes flapping noises.4. In a CD player, the players does not read it after 5 minutes.
If you want more durable CDs, buy at local stores. At least that way, it would be easier to return them.