@Wallace-Shackleton Hi. I bought the Chigee AIO-5 recently with a view to replacing my BMW Nav6.
Currently, I'm torn. The MRA app itself (running direct without CarPlay or Android Auto) is awesome, and you don't need to worry about losing phone service as you can download both the route and the map. However, MRA via Android Auto is flaky so you'll suffer the pains of being an early adopter. I'm sure the devs will come through but at the moment it's a bit like being an alpha or maybe beta tester. I've tried TomTom GO with GPX files from the MRA planner and that is a smoother experience in terms of app crashes etc., but the integration is not as seamless as using the MRA app.
The main reason I've not ebayed the Nav6 as I intended is the hit on the phone using wireless Android Auto. The battery drain is high, which means you'll be charging, using GPS and WiFi all at the same time. The phone can get hot enough to stop some features working and I even had it shut down navigation completely as it closed the MRA app. I've just this week replaced my Samsung S20 with a Pixel 8 with a fresh battery so I'll see how the Pixel deals with the battery discharge and the heat. Some people seem to use a 2nd "sacrificial" device for use for navigation whilst keeping their main phone safe and fully charged. This seems to defeat the point for me, as you then have three devices including the Chigee. But everyone has their own opinions...
My current view is that for a short trip, maybe up to an hour, I'd use MRA with the Chigee. It's a lovely device and the MRA app integrates so well with the planner. For a longer ride where the phone would overheat, I'll stick with the Nav6 and the tedious copying of GPX files for now.