UPDATE 6/2015: After 3 years of proper storage (cool and dark) these discs are unreadable and the color is fading/fading visible in places. Apparently they thought the invisible ink was a good storage idea. So I do NOT recommend these. What follows is my previous review. While working on my third 50 disc pack, I had very good results with these discs on my Pioneer BDR-207DBK internal drive on Linux. I usually record at 2X for more reliability on all discs, just out of habit. I apparently had two disks with write errors on one file, and the rest of the disk was readable. Considering the cost, I think their error rate is reasonable. And I've never had a problem reading old burned discs. In the last pack, two discs on the bottom didn't have a colored coating (labels) on top - they were transparent. However, one blew and tested well while the other did not. I didn't count the discs so I'm not sure if they were optional or Part 50. Compared to the prices of other discs, I think they're worth the money if you review the burning process and accept the infrequent rejection (which is common though). . I will continue to buy them.
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