The caps i used are rated ±5% , don't know if at rated voltage.
I would definetly not use them in coupling applications, but for decoupling, i think they do a good job.
For Coupling i use Mundorf's silver and Oil in my Raphaelite DP84 amp and Yaqin SD-32A CD player, Soviet K40Y-9's in my Yaqin MS-300C amp , and Tube Amp doctor Vintage Oil Caps in my Sansui TU-70 Tuner.
I have not compared the difference while changing parts, but resulting sound is better than what im used to hear with this DAC.
Previously, i had a preference fot the sound of my Yaqin CD player, the TubeDAC-11 was too bright sounding, even with very good tubes, now, i have less distortion or 3rd harmonics than before.
I mostly listen to music from my PC, so the move was right.
Caps probably are in break-in while i listen.