Ultimately I prefer to be more hands on and in the moment with my effects. When the C4 came out I got excited about it being able to potentially replace half my pedal board, but in the end I'm a knob twiddler that likes to make new sounds in the moment, which was limited by the UI of the pedal. It sounded great and I liked creating sounds in addition to pulling some from the library, but the pedal ultimately didn't work well with my work flow.I'm curious, why did you return your C4?
I'm currently trying to decipher if I should get the Future Impact or the C4... The deciding factor will be tracking/latency.
I have never owned a future impact but I've borrowed a friend's before. It's a good pedal but i'd say the interface of the C4 is more approachable. The C4 may track better too.