Easy one for me. I purchased a used PS Audio Perfect Wave DAC for an extremely reasonable price. Ok it was a steal. Everything was fine until I would stream songs in different formats (flac, then dsd, then aiff). Each time it switched formats there was a very loud POP through the speakers. It concerned me enough that I contacted PS Audio. The rep on the phone was very helpful but couldn't resolve it over the phone and suggested I send it in. So I packed it up and off it went. They ran through a battery of tests and found nothing wrong. So back it came but upon hooking it up there it was again. Another phone call and back it went. This time Ted Smith took a look, another round of tests, and the call came back that everything was functioning as should with that unit. They were going to send it back again but I took a shot emailing Paul McGowan and explained that although the unit sounded amazing when playing music it was the transition that I thought could ruin my speakers and I would probably have to sell it and look at another brand. Paul immediately responded that he would look into it. Shortly after, he responded again and said he had met with everyone involved in the troubleshooting and said they all came to an agreement. Would I be interested in straight up trading the Perfectwave for a brand new Directstream? Are you kidding? I didn't even buy this from you. I got it used for a small fraction of what you wanted new. Paul's explanation? "You are part of our audio family now."
Who gives customer service like this?!? Amazing company.