I installed mine. It works well. I am often lazy to plug in my phone to get car play and then I regret it when I want to send or listen to a text, or navigate handsfree, or change music handsfree.. When I do plug in my phone, then I forget and leave it in the car (pitiful, right?). Anyway, this solves all that. I just leave the phone in my pocket, turn on the car and I have Apple Car Play.I looked at the website and didn't see this addressed in the FAQs ... it appears that the device creates its own WiFi network and the phone joins with that. I currently use the 4G connection on the car's WiFi. Since my phone can't connect to more than one WiFi at a time, I'm wondering if this product can use the car's 4G or if the in-car 4G connection is unusable while on Air Play.
Just to clarify, I occasionally drive through cell tower dead zones where the car's antennae can pull a signal, but my phone won't.