I used some generation of Truly Ergonomic for a few years and it started getting repeating/missing characters... at $250 it was too big of an expense for me to rebuy. While it worked though, I was very happy with it
My impression was that they used some slightly chattery Cherry MX keyswitches combined with a controller with a poor debounce routine. (The electrical output of many switches "bounces" quickly on and off a few times when changing states. This can cause dropped or doubled key presses if not accounted for by the keyboard controller.) I’m not sure if the batches of Cherry MX switches they had were bad, or if some amount of chatter is inevitable given the switch design.
You should try the ergodox. I similarly bought the TECK because I wanted an ergonomic keyboard with a standard-ish layout and loved it, but it died in a couple of years. After that I bought an Ergodox EZ and have been very happy with it.
