I just installed a TC-3, which is the multi-channel CHT/EGT display in my RV-9A.
It was easy to install and works perfectly. The documentation was insufficient for proper install, but the Sport Flying Shop helped me out quickly. As far as I know, I'm the first one to report on installing on one of these for an RV.
The display is legible and the controls easy to use in flight. For example, I had reversed the setup for K-type and J-type probes. It took a few seconds in flight and I had reversed them from the menu definition and everything was fine.
Vern