iPhone X owner here. Upgrading this year. But the wireless charger in the car just does absolutely nothing good for my X. It looses connection indicated by the yellow and green light blinking, it heats up my phone to where it starts lagging, and I have yet to see it charge my phone up by more than 1% in all my tests. I've obviously turned it off since I've realized this. Hopefully getting a new phone soon will fix it up.