I've always thought Riteks were ok were ok and remember when they were great. They are so horrible now. Office Depot discs seemed to sometimes be RICOHJPN and those are pretty good, but my last few batches have been RITEK-F16-01 and they are among the worst discs I have even used. Even the RITEK-P16 codes weren't this bad. With 3 different burners one won't recognize them at all, the 2nd gives bad burns over half the time and 3rd burner only burns them at 4x. BTW 2 of the burners are only a year old with the latest firmware.