I wanted to come back and update my previous notes from early August.
As I shared then, I was having some issues with the echo (when using Aux as the source), and some issues with the OS and an "Unauthorized Product" error.
Hamilton's customer service was great - prompt and thorough - and helped me sort through it quickly. Switching the source from Aux to BT solved the echo problem and hasn't been as inconvenient as I expected.
They emailed me a software update (when you buy the kit, they include a fresh USB thumb drive for this eventual purpose; during the install, you can wire a USB plug to a convenient location for future updates/wired CarPlay) and I was able to install it without a problem. Solved my "Unauthorized Product" error and I haven't had any issues since. Works flawlessly on every drive.
Buy with confidence, and don't pay anyone else $$$ to install it; it's super easy and is a good opportunity to learn about your truck.