I too am burning 30 DVDs as I type this, for an aikido seminar project... I have used FujiFilm DVD-r 4x. All 10 in the pack came out well. Using Philips DVD-R 1-8x they work, but take twice as long in stage 4 (multiplex and burn) than the Fuji. I am returning them and getting another brand to try. Fujis are not available right at hand. Steve