I have this very drive, I've had it for about a month now. Ever since I bought it, it has burned extremely slowly. I've contacted TDK support, and they haven't helped much. There is only one set of driver's for the drive, so I know that's not it. I am running from a notebook computer, with a 4200 RPM drive. I have USB 2.0 ports via a PCMCIA card manufactured by Buslink. I am working in Windows XP Home. The drive seems to work fine, but whenever I burn CD-R discs, the times are terrible. The fastest burn I have had to date was 3:19, burning a full audio disc with approximately 20 MP3 tracks. However, when I try to burn data files, or MP3 tracks as data, the times slow down considerably. They go up to about 4:30. I still have not been able to find out what's wrong. I've tried using different media, and I am currently using 48x Fuji (Taiyo Yuden) media. I've tried using the drive vertically and horizontally. I really don't know what is wrong. My only idea is that perhaps my hard drive is too slow, and data cannot be sent to the burner quickly enough. This might account for the reason why burning MP3 tracks as audio is significantly faster than burning data.