Review on MAOBLOG Magnetic Rearview Mirror Phone Mount: Universal Clip & Air Vent Holder for iPhone 12/11/X, Samsung Galaxy S10/S9/S8, and All Phones by Leanne Young

After a few weeks of testing I can say that all the parts, the metal plate and the magnet, are holding up great. I use one in the car and one on a painted wall. Usually the sticky pad is the weak point, you never know if a 3M print is legal or not. The rubber pad on the magnet is great, but doesn't work so well when the metal plate is behind the phone case. I would recommend this product for anything that has a flat back to attach a metal plate to. The hold is strong enough for verticals. Hope it helps you to decide.