I did switch from C1 MK2 to UC1 (plus the UF8 and recently the UF1). Very happy with the change. I never imagined ditching C1, I used it for 3 years or so, but I just found the knobs on the C1 too inaccurate, and when I tried the UC1 it was so much better.
Also, SSL has added 2 more strips since this thread started, so thereβs more options now, although C1 is still miles ahead there.
I still prefer the C1 OSD to the SSL plugin or 360, itβs much more immediate, but I find I can trust the UC1 knobs to do what Iβm trying to do more and depend less on the plugin GUI. Iβm guessing the knobs on the C1 MK3 are much better, but Iβm married to the whole SSL Uxx workflow and ergonomics now.