The Jupiter Copper Foil 0.47uF 600VDC capacitors have been running for about 5 days and I can say these are one great sounding capacitor, one of the best out there. Upon comparing them to the best I have heard, (Duelund Copper Foil 0.47uF VSF the capacitor), they are very different, but very close in performance, each with its strengths, the Jupiter may be a little leaner, slightly brighter, and whiter, and do not have the duelunds lovely lower midrange on down bloom, weight and warmth, but they have a beautiful upper midrange clarity plus an all over sweetness and lack of distortion. Some audioheads will prefer the Jupiter's detailed smooth clean sweet character, but the final decision is always system dependence. A fine capacitor and with more run in time they can only improve.