Picked these up from NewEgg awhile back. Haven't used too many but did not have any problems with the few I burned. Here's the CDRIdentifier info for the 24x:
ATIP: 97m 28s 26f
Disc Manufacturer: Multi Media Masters & Machinery SA
Assumed Dye type: Phthalocyanine (Type 6)
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
nominal Capacity: 702.83MB (79m 59s 74f / LBA: 359849)