I bought this battery cover, as I was the original cover of Samsung too smooth and slippery. The new cover is rough, so that the phone now can no longer slip out of your hand. The cover fits just as well on the mobile phone as the original cover. In addition, the mobile phone is now a little heavier, but I did like better, since it is so even better in your hand. In addition, the mobile phone has become a bit thicker. Visually I like the cover also very good, although it shines a little too much to me. Therefore, the one star deduction. Overall, the cap is really great but, for those who want to have a chic alternative to the original cover.