It has been running perfectly smoothly ever since I switched to a Mac from my PC (which had buffer issues with the Connect). I do want to mention that my first unit became faulty - the phone button stopped triggering properly after a few months of use - but big ups to Bitwig and the dealer JRR Shop for replacing it within just a few days.
I only have two synths in my studio: a 70hp Eurorack system and a PolyBrute, with the PolyBrute connected to the back and the Eurorack to the front inputs (I don’t even have a mixer or line out in my rack). I honestly can’t think of any alternative to the Connect in my case. Not to mention, the AD/DA sound quality is among the top - I’ve had the RME ADI-2, SSL 12, and ID24, and it’s definitely on par, maybe except for the headphone out being a little bit weak IMO.