This is something I'm concerned about too. I ordered one from AliExpress and their product page mentions brightness adjustment, but there's no details. For those who have it, how does it look at night? Is the display blinding? If you turn the display off using the on-screen power button, does it come back on the next time you turn on the vehicle, or does it stay off until you touch it again? When it goes to the clock screensaver, does that stay dim enough to not be intrusive? I agree with the others that all I really want this for is to allow back seat passengers to adjust their own seat heat, would be glad to remove all of the other functions.
I paid $137.55 shipped from AliExpress. It will be a couple of weeks before it gets here, but that's probably true for my Model Y, too.
The glue failure problem is good to know about, I might consider adding some JB weld or something to the back side to make it more robust. It sounds like the temperature fluctuations coming from the vents immediately below it are hard on the cheap adhesive.