I've used a Mumbi bracket, while bomb held, but had small retaining lugs who discontinued eventually. This support, however, is in one piece, has a wonderfully smooth adjustment of the width and the arm and a very good padding for the smartphone. It is particularly well resolved that the holder of the lateral arms tapers to the front and so the smart phone can not fall out of the front.
My Galaxy Note 4 fits in loose and even Nexus 6 or devices with shell should seek strap.