I went for a drive. The phone holder I'm using is this one:
https://www.amazon.com/gp/product/B074Z6GG6W/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I have it sitting up on the dashboard. This puts it further away, so I don't have to change focus so much when looking at it.
It is a smidgen too low, so the alerts to put my hands on the wheel are partially blocked by the wheel.
I did find that I had to kill the app to get it to re-connect after doing something outside the car.
A feature request: I'd like to see the tire pressures on the main screen. I currently have a screw in one tire, it has not started leaking yet, but the local America's Tire does not have the tires I want in stock, and if they can't repair the tire (screw is in at an angle), I'd be without my car for a few days until they get those tires in, so I'm delaying until they are in stock. I'd like to monitor tire pressure in any case, and the current setup in the software makes that tedious.