Problem 1: The suction cup is somewhat reluctant when it comes to grip. So about once a week my holder lies on the floor and if you want to attach it again, only helps if you completely douses the holder with water, since the edge sticking and prevents an optimal vacuum can form under the vacuum cleaner.
In short: the Saugfußmechanismuss could revise again. The walk from my Navigon Navi is much better and keeps even without moistening.
Problem 2: I have a S-view Cover from Samsung. Since this cover of the battery cover is replaced, the S4m is now a few millimeters thicker. Since the latching holder was anyway too tightly calculated, it is somewhat tricky if you want to install the minimal thicker phone. Here I would have preferred a solution in which you can attach the phone variable. At least it is possible to fix the S4m including original cover.
Note: S-view Cover replicas that have an impact all around protection, do not fit into the holder!
In spite of everything a buy recommendation. Although my car is very hard on the road, good dashcam recordings are possible because the arm absorbs the vibrations realtiv well.
Edit 06/16/2014: Unfortunately the suction cup holds only very bad at the plate. Since the problem despite cleaning no longer persists, I can no longer recommend the holder now.
