First, I'm very picky when it comes to cases. If I'm using a top of the line smartphone, I want a case that reflects quality just like the device does. Second I want all buttons, ports, etc to function or be just as accessible as they are on the phone without a case.
I simply cannot say enough good things about this case. First it's quality is just stellar. Second it's a two piece case that appears as a single unit when installed. Next the rubber or derivative material on the ends does not pickup pocket lint. The fit between the rubber inner and the outer hard shell, is so perfect that once it's on the phone it appears like just a thin one piece case. There is just enough of a ridge around the bezel that face down on the table the screen does not touch.
The rubber covered buttons work better than the original buttons. It's very slim and adds very little to the size.
I've probably bought over 50 cases in the last few years for my various phones and this one is the finest of all. I don't buy $5 cases, I buy what fits and works best no matter how expensive. This was a shocker as it's not very expensive By the way I got it on Amazon for half off. They are in stock now.
Better than my pics here's the link to this case on Spigens Website.
http://www.spigen.com/galaxy-s4-case-slim-armor.html