I just returned a NEC ND-1100A that made well over 35 DVD "BACKUPS" all using Ritek +R, and Memorex +R media. I returned the drive and purchased a Sony DRU-500AX. The sony drive will create +R disks but they are not playable in my Onkyo Set top. They work fine on the computer. The Sony will create -R disks that work fine on the ONKYO, but not +R's. The +R disks from the NEC work great. Why does the sony create +R media that my settop does not like? Again I know it is compatible because I hav 30+ disks from the NEC to prove it. Disks created with both Instant Copy and DVDXCopy have this problem.