Fwiw, I was excited about W4S DAC sometime before the pandemic, bought and then returned one. I thought it was kind of dry, like the original Class D Amps, and sterile/clinical to my ears. I am not sure if they were using ESS chips back then.
Anywho, 6 years or so is an eternity in Digital. I also remember having to hassle with W4S over the return , even though they are an Internet company that prominently discusses the return policy. Ultimately it worked out