I installed the head unit. I haven't installed the rear camera because I am waiting until I tear the car apart to install the Noico and the stereo system. Until then, I connected the rear camera input to the head unit and fed it through the back, so I can just run the wire later, and I wired in the reverse trigger wire to an existing wire using this guide, and it worked to activate the rear camera on the head unit when I put the car in reverse:
https://www.autoharnesshouse.com/19867_add.html
The head unit is definitely awesome. It is so much more responsive, and there is a significant improvement in sound quality. It connects instantly wirelessly to my phone initiating AppleCarPlay without a need to push a button or plug my phone in, which is exactly what I wanted. Definitely worth the price. If the head unit has improved sound so well, I am eager to see what the new sound system will do.