Ok. Been using it for a few weeks and I can say it works as advertised. It simplified my setup a lot since now I can separate the stereo and home theater paths (my speakers are connected to both the receiver and the power amp for stereo)
The build quality seems very good. I did test if there was any voltage bleed when using one of the inputs, there was not.
The audio to my ears seems absolutely the same.
The only thing that was kinda weird (I am using the audio sensing logic so no 12v trigger) was that without any audio input from time to time I heard a click coming from the box (like it was doing a switch)
But other than that I am happy with the device.