I preordered the Sona from Caeden in May. I knew it would be a while before I saw it. But they kept pushing it back. At first I felt like they were trying to be good to their customers because they were concerned about the quality of the components. Then I got the device. Clunkier than expected but it's new tech and that's sometimes to be expected.
Well the device never really did what it was supposed to. Some of the features were ok but the big one (heart rate variability) never worked for me. I experimented with how I was wearing it, how tight, etc. No luck. Then after a couple of months, it stopped working altogether.
Attempts to contact them have been touch and go. It seems like they don't have enough staff to keep up? And from their Facebook page, I'm not the only disgruntled customer. I am currently still trying to get my $ back from them.