I only use them to store tv off a Pioneer DVD Recorder, and haven't tried my PC. However for the task I use it for these disks are superb, easily besting makes such as Imation and Verbatim, which cost many times more and which have a ten times higher failure rate. So, if you want to archive those golden moments from the one eyed monster, these are the disks to use (and good value too, especially the 100 spindle).
I have just received these disks, and have discovered them to be of the highest quality.
The actual disks are manufactured in Taiwan by Ricoh (of Japan) and use a good quality dye that may be considered an industry standard (my words).
This really is very good value for money