There are several competing DVD formats including original DVD, DVD-R, DVD+R, DVD-RW, and DVD+RW. The DVD-R and DVD-RW format appear to be winning out in the marketplace over the DVD+R and DVD+RW. The DVD-R format seems to be the most compatible with players designed for the original DVD format and many but not all DVD players can play DVD-R disks. Before ordering, I highly recommend that you check here to see if your DVD player is likely to be able to play these disks. Your player should have a rating of good or excellent.