Sorry to hear about the issues and mixed results; most seem to be associated with the higher end DACs and DDC interactions. My experience is based on the relatively simple update on an Ares ii. My experience was very successful. Aside from some minimal confusion on my part as I stepped through the pretty well done instructions everything went smoothly and was successful. I haven’t had a lot of time with the updated Dac but I’m enjoying the sound.
I have to say that I’ve had very responsive help from the Denafrips staff (given the time zone lags). I believe they are passionate about providing the best support and sound quality possible with their products. I purchased my Ares ii used and they have treated my questions as if I was a major customer. Very happy with my Dac for my investment.