About the device itself:
I have it brown in color. I like visually super. Above all, it is very easy to handle and to operate with one hand. However, if you have bigger hands, I can imagine that it is very small. The device is what you'd expect from Samsung. It is well made, have not experienced any defects. The S4 mini runs super fast, even though only a dual-core processor is installed, but can a lot, as far as I can tell. I think there are enough reviews about the device on the Internet, so I do not need to enter details. For me personally it was important that the device can replace my old S2 and not worse. And this is certainly the case. Battery I can not say so much since I only own the device two days. But so far I am satisfied. But I have to mention the fact that I anyway disable all unneeded apps. There have indeed but some apps the need from time to time to wake up the phone, which of course the battery is impaired.
So I am very satisfied with the device and can only recommend it.