Ive been using these disc's for about a year now and gone though 500+ discs only times i have ever had problems was due to me making mistakes on the burning speeds.
cant speak for dvd movie use but for 360's burning at 4x speed never once experienced a problem with them
I bought a 25 of these before and out of the 25, 4 discs messed up. As for the other reviews, the burn quality depends on the burn speed and the quality of the DVD burner you use. I use a lite-on DH20A4P to burn discs at 4x.