CD-Rs & DVD-Rs work in almost all players without any problem. There is, however, the risk that certain players, especially older players, may have a hard time reading a disc correctly. The type of compatability problems range from the player not seeing the disc at all, to the player having a hard time skipping from scene to scene. The number of players that reject these discs is always declining, but we want you to be aware of the possibility of certain players not reading the disc correctly. Often when someone calls and thinks the disc is defective it actually is not. It is the player they are using that is giving them difficulty. We stand behind our discs and will replace them if they are defective but if they play in most players, they are not considered defective.