In summary, but a good buy

I have been involved with both the numerous 5-star reviews as well as with the 1-star reviews and can only say how annoyed parents of contending brothers and sisters: You're both right.
The holder is designed for the standardized SGS2. I have the slightly larger Samsung Battery Samsung EB-K1A2BEBEGSTD Battery (EB-F1A2KBU) with case back for Galaxy S II, which the phone a total of "thick" makes the slightly harder rear, yet it fits nicely into the holder. Yes, it can not be done with one hand, that smartphone to remove after use in the car out of the holder, but that's why only a 1 star rating ?? For me, for that there are a star deduction, but I just use both hands and then the device is removed in a few moments from the station.
Otherwise, it was important for me that the holder is stable, is well made and easily adheres to the disc. All this I can only confirm (incl. Involuntary pothole test).
The smartphone is stable and protected in her and is charged during the ride and if you take out both hands to the back then lands the SGS2 well in hand and not somewhere in the car. Sure optimal to solve, but the two seconds, you sure have both hands free.

Discharges that the mobile phone with navigation also connected to the power I can not confirm (what vllt. Is with me on stronger battery (see above)?). However, it invites of course much more slowly - clearly, if the mobile phone is under extreme stress (display, GPS, navigation, and perhaps the way again check the Facebook account). Tip: Just turn off the display. The Navi nevertheless announces itself yet and at eg long motorway journeys you have to see the route not always.
In the holder is a cutout for the camera of your smartphone. However, I have this to take pictures or to film ever (like some others here) understood this while driving ... while driving ?? ... I got it from scratches understood by the holder and for passts to protect the camera.

Again summarize: If you like photographed while driving with bracket, filming or always has only one hand when entering and leaving freely or in spite of 100% utilization of the CPU is hoping the phone in half an hour's drive to view the holder should not be bought. Otherwise, I think the price / performance ratio (22,60EUR) justified for the holder and the holder well.