Antelope Zen Quadro Synergy Core

I was looking for a portable interface for my synth performances, and I was immediately attracted to this new unit.

As soon as I tried it, I was really impressed both by the sound and the versatility, because I can also use it stand-alone as a mixer for my live performances: during my last show I connected my modular synth and Digitakt to the Zen Quadro. I simply routed them (directly from the screen) to the output and to the headphone out, so I could control both the output levels and my in-ear levels. In the meantime, I recorded the performance with my iPad with an outstanding quality and it's all in one small device!

Not the best
I tried the interface and encountered several problems:
- It took me 3 days to register the interface with their software, I had to disable the firewall to proceed with the installation.
- Later I tested the preamplifiers, with no instruments connected I set the gain to the same level and noticed that one of the inputs had more noise than the others.
- The DSP effects once crashed, I could no longer change the parameters (I do not attribute this problem to my PC, which is a Thinkpad Carbon x1 10th gen i7 16 RAM and has never given me any problems).
- Sometimes, when I turn off or on the headphone or monitor outputs, annoying glitches appear.
- The small buttons on the panel move a lot.
My previous interface is an Antelope Zen Go and I have noticed that it is better built, the buttons are more stable, and in general I have never had these problems.
The sound of the monitor outputs is much nicer than that of the Zen Go, particularly detailed and deep, but everything else makes me doubt this interface, which is why I am unfortunately returning it.