I still use DA 1, and burn very full discs almost all the time. I rarely ever have freeze problems. I think blank media, burn speed and other factors are more a cuase for freezes. I use high quality blanks, never put paper labels on discs (I print directly on the printable surface), and never burn faster than 4x. I have a 7-tray DVD duplicator. I take the manufacturers advice, and burn my master at 1x in Architect and then load that into the duplicator’s hard drive. Almost all my projects are 95-100% full discs and I virtually never have bad ones. I think DA 1 is okay is this respect, from my experience.