I promise I am a customer not an investor, but although Brodit mounts are expensive they are properly made to fit cars, they avoid interfering with any functions including the airbags, and they are rigid. Mind you, I had to import one of the ones I currently have installed. They are worth looking out for.
They also come in two parts which screw together - car mount and phone mount. This meant I was able to make a dedicated mount for one of my phones (out of 3mm marine ply and leather, for anyone who cares) and attach it to the Brodit base.
