I know that doing a quality scan with a DVD-ROM drive is not very accurate but at least can have a small ideia if i got a good burn or not. I used to have a Liteon LTD-163D DVD-ROM but it just died.. so i got this 166S very cheap (new, not used). Now the problem, i dont have the option on Nero CD/DVD Speed to set the scaning speed, just Maximum! I used to select 4x with the LTD-163D, always worked fine. I tried both Kprobe2 and DVDinfoPro, on those 2 programs i have the option to select the speed but it's not working! Even if i select 4x, the drive starts on 3x and always up to the Maximum speed This never happened with my old 163D. BTW, i tried the latest firmware (stock and hacked from Codeguys) and some older firmwares, tried latest Nero CD/DVD speed 4.50 and 4.06 too.