FYI: I have used the PNY disks for over a year now and have had ZERO problems with them. I have burned quite literally hundreds of them and have 2 un-opened 110packs sitting on my desk waiting to be tapped : )
The burners I have used them with are, a Yamaha 6x scsi (now deceased), a Plextor 12x, and a TDK 24x. And yes, even though none of the PNY's say 24x capable I can assure you they will do it. I burn all mine at 24x, no coasters, no read problems. Go get um.