I have no experience with that mount or style. Personally I wouldn't want anything blocking that much of my view either.
I use a magnetic holder from Amazon that was about $13 or so. I've used it everyday for about the last 6 months and it's as solid today as when I first bought it.
It holds my ZTE ZMax Pro which is bigger and heavier than an iPhone plus — without any issues whatsoever. It has never fallen and is very simple to slap your phone on and off since you don't have to mess with clips/clamps or other "squeezy-majigies". Plus it does not obstruct your view yet can be easily seen without moving your eyes much if using a map.
In the last pic you can see the magnet under the case because the case is clear. If your case is not clear then you won't see the magnet. You don't even need a case either as you can apply the magnet to the phone itself too.
https://www.amazon.com/dp/B00I608BJ8/ref=cm_sw_r_cp_awdb_Qi3izbHQRVR05