I have 2 800a's that I have tried different firmwares on. I got very different -R results with the 800a dual firmware verus the 822a firmware. The 800a dual burns -R fairly well but had problems with some Ritek R02 + media that I have. The 822a firmware burns the Ritek R02 great but never finishes a -R burn. I tried this on both drives with very similar results. By the way, they are both Khypermedia branded from OfficeMax. I have not tried DL yet and probably never will, I will use my Cyberdrive 162DX for that if the media ever gets affordable.