I'm actually embarrassed to say that in the 13 months that I've owned my 5s Iphone, I've purchased close to a dozen cases for it. At the end of all of this, I have settled on the Magpul Bump case as my favorite of all. So, I have this case in 3 different colors, and I rotate them just for the fun of it.
Don't be embarrassed, I've been searching for over a year and have tried
so many cases, but they'e all been found wanting in one regard or another!
I'm glad I'm not the only one!

I've tried countless cases, so much so, that Amazon must be totally fed up with the number that I've returned.
If it's not lack of 360% protection it's fingerprints, or bulkiness, or slipperiness, or worst of all feeling flimsy/saggy/floppy around the lip,
especially below the Home Button, it's a combination of all of them.
I've not found the "perfect," case, although I've seen plenty I like for the iPhone 5, that I'm thinking about trading my iPhone 6 in for the SE!
I found, as close as damn it, the Snugg Ultra Thin Leather case, amazing, but as it's leather coating on what seems to be a cardboard back, it damages easily.
All fine and dandy to buy another but they seem to have changed the design and you can no longer fit even the Apple Lightning Cable into the port with the case on!
However, having abandoned that, all in all I have kept the following:
1. Caudabe Sheath....great fit and although not "saggy," it does come away from the case if you pull it.
2. Slider cases, they solve most of the above problems, but fingerprints can be a pain and they're not very grippy.
3. Magpul Field case, love it, it ticks all of the boxes, apart from a bit of bulkiness, but I find I come back to this time and again, as I love the feeling of protection it gives and I love the feel of it in the hand.
4. Magpul Bump Case, as above, but after a while, I find it "heavy," in the hand and end up switching back to the Field Case!