I just had to say how bloody brilliant these discs are. I have burnt over 2000 DVD media over the last 4/5 years, and they are always the mid level ritek disks (amongst others/verbatim) However, I found a bargain 100 Taiyo Yuden discs for £12 and so thought I would these a go. I am just shocked at the quality of these discs. They have an average error of 2, this is after I have been used to errors in the range of 20 (some Ritek) to 400 (Prodisc). If you need archive media, use these. Burnt 100 and NOT 1 FAILURE. All with PI errors 5< average.