I bought 100 of these on sale, I thought Sony, should be good. How wrong I was.I've had a high fail rate, about 3 of every 5 disks. I've had no problem with the red hp or verbatim disks. If I try something other than those 2 again then I'll buy the smallest quanity I can, see if they work first before buying 100. Not even good coasters :-(