The mixer itself is fine: compact, sounds good, and does what it should on a hardware level. Unfortunately, the companion app completely ruins the experience.
The app randomly quits while operating, which is incredibly frustrating during actual use. Even worse, the EQ band frequencies regularly reset to 0 Hz, and there is no possible way to change them back. When this happens, EQ becomes unusable, which defeats a major purpose of using a digital mixer in the first place.
Because so much functionality depends on the app, these issues make the Flow 8 pretty unreliable and, in some situations, almost unusable. Solid hardware, but the software needs serious work.