@DED, I’d like to know what you mean by “tested and working”. I assume that it means that it is able perform the basic function of reading and playing audio CDs.
How about other issues that have been brought up – delays caused by the drive spinning up and down, long pauses between tracks, and lack of gapless playback? Do your tested drives run without these issues? Personally I believe that these are software issues that can’t be fixed by switching to a different drive, but I’d love to be proven wrong and I will purchase the drive if it isn’t the case!