I highly suggest that folks sign up for the tour to hear this wonderful device.
I spent a good week listening to it and came away extremely impressed with what Leo has done with this DAC hat.
For anyone that is using a Squeezebox Touch or similar unit, they should find this to be an quite an upgrade.
I did compare it to a DAC I built with AK4990 DAC chip and Salas shunt regulators DIY modular DAC
I really could not pick one over the other. The sonic difference was completely dependent on the file being played. I feel both units are very transparent.
For under $250, the combination of a Rpi and the ApplePi DAC board is an outright bargain in today's audio world.
When it is released, I will be buying one.