My brother burnes Ritek 8X DVDs at 12X with that burner but they say Taiyo Yuden DVDs are the best. The different between - or + is just format. I believe the - works better with the majority of stand alone DVD machines. I bought Ritek -8 X DVDs and I have the same burner. I haven't burned any DVDs yet, awaiting software to arrive before I can burn.