I have been using these with the Sony RCDW100 writer - possibly the only model still available in the UK that uses these type of Audio only CDRs.
I have been testing the results with Nero DiscSpeed which tells you what errors are present and they perform very well on the whole, with no C2 errors (essential) and reasonably low C1 (correctable) errors.
The only caveat is that they are occasionally rejected by my recorder often halfway through recording at standard speed thus ruining the recording. It seems they are made by Ritek (according to the DiscSpeed program) and I have found over the years that Ritek produce a high level of dud discs (subjectively about 15%) which is why I have now switched to Verbatim and reduced my coaster count to virtually zero.