We'll I must have done something right today, because my new Spigen Slim Armor case just arrived!! I got the white one to go with my white S4 and so far, I like it. Case fits like a glove and the oversize volume rocker, and power buttons are great. Nice and responsive with a tactile feel.I was worried as I was initially concerned if the back was rounded "Ala like the HTC One", but it's completely flat. The TPU rubber on the top and bottom is very dense and does not add any bulk at all. Case extends about a millimeter or two over the entire top so you can place it screen-side down with no worries. I don't use a screen protector but it comes with one, a cleaning cloth / LCD cleaner, a squeegee applicator, and 3 Jelly-Bean home buttons.The only thing I wish it had was some kind of texture on the sides, as I can see it could get slippery in the hands. But it's a high-gloss, almost automotive type finish that looks great and will slip in and out of my back pocket no problem. All ports are easily accessible and overall, Very high quality. Please excuse the crappy pics as I was taking them with my iPod one-handed. If anyone's on the fence on this case, I'd recommend going for it, as it's very nice.
-cheers