I got my Spigen Tough Armor case (gun metal colored) and here's some of my thoughts regarding the case.
Its a bit bulkier then I was expecting. It does add a little more weight to the phone, but nothing like a otterbox which makes it even heavier imo.
The squared off edges were more pronounced then I was thinking they were would. They do make the phone a bit more holdable and after a day of usage, I've largely forgotten about it. The Slim Armor has rounded edges which follow the contour of the phone better but I was think those edges provide better protection.
The front is nice, the rubberized portion of the case sticks out just enough to offer protection but not enough to really impact usage.
The cutout for the camera shows some nice depth for protection.
Overall, I'm pretty happy with the case, I purchased it on Amazon for about 17 dollars, a far cry from the 35 Spigen is charging. That being said, given the lower price, I may order the Slim Armor and compare the two.
One thing I do like about this case is that its not likely to slip out of my hands which may be something that could happen with rounded corners.