In my 2004 Sansui DVR I used 1x Princo DVD-RW and 4x DVD-R. Though I prefer -R for most recording I like to have -RW now and then for a definite non-keepable. I have plenty of 4x DVD-R but no more 1x DVD-RW have I found. Some TDK 4x DVD-RW failed to work or format (wrong disc message). Since the Princo 4x -R discs always worked is it reasonable to assume the Princo 4x -RW would also work? Need opinion before risking ordering any. Even if I found some already recorded from before, I have found the -RW go bad after awhile and prefer new ones. Now trying to find some Princo 4x DVD-RW in case I decide to try some.