Well, those are pretty well-known, and dreaded by some, but since the forum is new, I'm gonna share my experiences with them. These are Imation media, 16x certified: ATIP: 97m 26s 66f Disc Manufacturer: CMC Magnetics Corp. Reflective layer: Dye (Short strategy; e.g. Phthalocyanine) Media type: CD-Recordable Recording Speeds: min. unknown - max. unknown nominal Capacity: 702.83MB (79m 59s 74f / LBA: 359849) With those I had very poor quality, massive slowdowns on the last 25% of the disc, high C2 error rate (Acording to Nero CD Speed), and the drive would make some odd "spinning slowly" noises after the disc had finished reading, and wouldn't stop making those noises until I ejected the disc. Burnt at 16x on my LG GCE-8160b, latest firmware. Definitely not recommended.