I have the previous model in use and, frankly speaking, it suited me in everything except the thunderbolt2 port and the presence of only 4 afx slots. The new discrete 4 pro has everything I need, a thunderbolt 3 port has appeared and now the device has 16 afx slots.
The priamps are very clean, their sound is just something incredible, even budget microphones start to sound much more expensive through them!
In terms of AFX processing, their plugins sound fantastic and the library has just about everything you need to get the job done.
The disadvantages of this device is the lack of a Thunderbolt 3 cable.
And one more, but for me a very serious minus is that having bought discrete 4 pro for the promotion and having received a full set of afx plugins, I cannot use these plugins on my old card! I don’t know what it is connected with and why they did it, but this is a very unpleasant moment! When buying a new card, I expected that I could use all the plugins on my old card. Now both cards are registered on my Antelope account, but all plugins work only on the new one!