I have the orange androidified case. I love it. I specifically chose it because the buttons were uncovered. That way when I slide it in to my VERY tight armband holder when I go on my runs, there is no chance of the power button being pressed accidentally. The buttons, just like the screen and camera lens, are slightly below the level of the case. No chance of accidental press, but it isn't difficult to find/press the buttons intentionally.
It is very easy to slide in and out of pockets, assuming you aren't wearing hipster-tight painted on pants. These cases really do not add that much size to the phone, and they fit like a glove.
It's been said before, but note that these cases are slightly translucent, so assuming your N5 is black, the colors will be a little darker as the black shines through. It's not that big of a deal (my orange still looks orange, not brown or anything like that). I'd take a post a picture but I'm at work right now and don't have access to another camera.
I got my case from Amazon. I'm an Amazon Prime member so Amazon is my default. These cases are inexpensive, so you may need to pay for shipping if you are not a Prime member and your order is below the free shipping threshold. Not sure about eBay.