The Premium was the top of the line 52x cd-rw burner. It was superceded by other drives, like the P
PX-5224 and PX-230, then Plextor Japan and Plextor Europe reintroduced the drive in a new version with AMQR (Audio Mastering Quality Recording). Plextor America has some Premium2, but is not marketing them because of the price--very pricy compared with the $29-39 commodity drives available today. It is an excellent drive, especially for audio mastering. If you're just making MP3, anything will do.