It doesn’t change that this is an incredibly niche product for a particular demographic. I don’t see this product being wildly popular based on Price point, it adds weight and thickness, but this would more suited for heavy iPhone users who can overlook the other factor listed.
I fixed one of Mophie’s desk charging mounts to the left of my steering wheel onto the windshield; it’s the only place I am comfortable having a phone mount while I’m driving. Being able to easily remove and return the phone to its mount with one hand is too much for me to give up and the lack of a Mophie wireless charging battery case has been one of the main reasons for me to abstain from upgrading to an iPhone X.
I’m not very particular when it comes to smartphone case aesthetics or how slender the profile is. As long as it keeps the phone in mint condition for when the time comes to trade it in/sell it and let’s me retain the functionality and convenience while I’m driving I couldn’t care less about anything else.