Skepticism on the little thing has evaporated, when I tried it. My Galaxy S4 sits very sure the spring of the holder is strong enough. Can that the cell phone behind the rubber part of slipping, as here wrote one reviewer, is impossible with me. This would require the phone to be significantly thinner. The ansich good grip is made with foam rubber strips. How long do you I do not know, but they apparently see robust from. The mobile phone can be operated with this holder only in a horizontal position, unless the used tripod can be rotated by 90 °. Together with a slight small tripod it is ideal to watch video and movies on the go. So in short: recommendable
