The S4 mini is indeed a rather "slim" phone and the flip cover that replaces the back of the original cell phone rear panel, the S4 holds mini extremely narrow. The front page is processed very sturdy and should be able to withstand a lot. They can easily turning backwards when using the phone. The front panel then closes again automatically. It is then not always the same plan on the display, but that's no problem for me. Either migrate the phone anyway in a pocket or placing it flush with the display downwards.
The flip cover is doing what it should: it protects the phone very well. In addition, all the buttons are easily accessible and the phone looks so out really great. Overall, the flip cover from Samsung for me is the optimal solution in terms of functionality, level of craftsmanship and fit. Those are my worth 5 stars and a buy recommendation.