I had a few issues with my PSU, had a replacement sent but had the same issues with it. Keep in mind this is just a sample size of two so your mileage may vary. I bought this particular PSU brand/range simply because of the Silent Wing fan it uses as noise is a significant annoyance for me. I planned on using the PSU for multiple builds in the future hence the 1000W rating.
Almost as soon as I installed it in my system I had issues with the PSU producing a ticking/tapping sound similar to someone running their nail slowly down a ridged food can. I also had issues with increased EMI (Electromagnetic Interference) for my sound card as well as coil whine for my mobo VRM (I'm not running a heavy OC, just 4.7Ghz on a delidded LM i7–8700k with max running voltages of 1.38V avg at 1.29V). I am now using a separate PSU brand/model and the VRM coil whine has decreased a significant amount and the EMI picked up on my sound card has been removed. Concerning the coil whine, my CPU is installed into a Z390 board, a chip-set that after initial research apparently has heightened issues with coil whine. The EMI that my sound card is picking up on is most likely coming from an RTX GPU in my system, which just as with the Z390 chipset seems to have heightened issues but with EMI rather than coil whine. The PSU seemed to amplify these issues to a point where it was personally unbearable.
My experience with the Be Quiet! support however was very pleasant. I first contacted them with a description of the PSU tapping noise and a sound file. Within a few days I got my first reply wherein they informed me they had contacted Mighty Ape to organise a replacement unit to be sent to me. No running me around, just a quick response with a proper solution.
If you plan on buying this PSU with the intent of running a silence focused build then I would advise against it. I would only recommend this PSU based on my experience if you want a fully modular PSU with good price to performance ratio for a build that will have other noisy components (such as high RPM chassis fans).