I bought the black Mini S4 there a week and I'm completely satisfied! It works perfectly, it is extremely fluid and aesthetically I find it very successful. It makes a lot less cheap than the S3. I found the S3 and S4 too big and S3 Mini not powerful enough. But the S4 Mini is just perfect for use as I do. It has the ideal size. The photos are very good for this type of phone. He did not train at all. Be careful though some gadgets that make the characteristic S4 are not on this S4 Mini and that's the only negative for my taste: Air View, Air Gesture (the fact interact with the screen without touching it), Multi Windows Smart Scroll and Smart Pause (the gadget that detect eye movement) are not available. After just go on Youtube to see the differences between the S4 and the S4 Mini. I am completely satisfied with my purchase.