I bought this off eBay. Took a while to come from China but got it this week and I love it. It came with both a vent clip mount and a suction cup window dash/mount. I used the vent clip and it is stronger than the one I had for my previous mount.
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I bought an Aukey 21W USB C car charger and a USB C cable and hooked it up. Magnet is solid and it sets off the MagSafe animation on my phone when I attach it. It didn't hold the phone in my clear non MagSafe Case, but held the phone solidly. I went and got the Apple Silicone MagSafe case and it also holds like a charm. I have no idea if it's giving true 15W charging, but it held/charged my phone while using GPS which is all I really care about.
I use CPlay2Air for Wireless CarPlay as well, so now this is the ideal car setup.