I bought the TPU Cases branded Mumbi, because I am very satisfied with Mumbi. All products that I bought so far have been properly plus very reasonably priced so good price / performance ratio !!!!! The protective cover fits like a glove and the design is very elegant. There is no problem up the sleeve and down to increase, the back of the sleeve leaves no fingerprints and the like also is no discoloration of the protective cover to see. The keys can be operated pleasant. If the product can not go wrong, that's why I recommend it to anyone !!!!