I have an Airframe+. It's been good so far and hasn't dented the leather case. Getting the phone into it is a little more awkward than the old Airframe. Seems like the clamping force is tighter. Might just not be broken in.
Unfortunately, there's no good vent in my Tacoma where the huge 6+ screen doesn't end up obscured by the wheel a bit, so I have an iOttie Easy Touch 2 on order to dash-mount instead. I've kind of missed my AC blowing on me too, ever since I started using a regular Airframe a few months ago.
My only real concern with the iOttie that the dash mount may be a thief magnet, even without a phone in it. I have a double-DIN LCD head unit that normally flies below radar, but maybe not so much with a visible mount.