I had my C3X audio device fail a month or so past warranty. It literally couldn't detect the sound card anymore. My car is not supported, and I've been on a fork since the beginning. Few line of code changes to get it working again and it's almost two years in use. And yes, I tried flashing any and all available releases/forks. The sound hardware was not visible in the kernel on all.

I've given up on the latest models and don't bother with the automatic cruise control. But just the lane centering is extremely helpful.

When people ask me about the device, I tell then it's the next version of power steering. And if one has never driven a car without power steering, one may not understand how much easier it makes the drive.

Thought about upgrading to the C4 as the original owner I could trade mine in for a discount. But the first thing I noticed on reddit threads were the C4 H/W failures, and that made me not want to bother figuring out what's needed to get the C4 running on my car. Wish they figured out how to bulletproof the device, would love to add the GPU.