Interested in this thread. I made 12 recordings of MP3s on Phillips CDR 80 52X and then I had to reformat my PC.
When I came to put the Mp3s back on my PC, they were not recognised...I felt quite sick and then found a programme Iso Buster...cost £16.66 but was well worth it as it recovered all my stuff.
The CDRs I bought were not the cheapest by any means, but now I would never buy the bargain variety as it is too risky.