these discs are the worst of any i have used with the sony dru-500 combo dvd burner. i used memorex, verbatim and optodisc with no problems. i tried to contact customer service, but they were of no use, saying that the discs were for general use and not for video - even though their website says that you can use their discs for video. spend a few more cents and get some quality discs. stay away from [khypermedia!!!]