HUGE Improvement in terms of digital audio interface.

You can basically run 32 bit audio now with little issues. The PCM5102A is a direct competition towards the now-pretty-popular ESS Sabre 9023.

The chip also runs asynchronously with a low jitter external clock.

In essence, a very very compact high performing DAC module.
At the price he's offering, it's a steal. Get it. Even RSA's dac is light years behind this.