I have a Willsenton R8 and can attest to its attributes. Great tube qualities of bloom and holographic sound staging, and surprisingly fast tight bass. Highly recommend. That said I imagine their 300B is glorious.
I was a little hesitant to buy something that would have to ship back to China if/when it needs repair and really wish it was made in America, which is why I’m on the waitlist for a Decware 25th anniversary Zen.