My friend Allen (co-founder of the delicious cashew cheese company Nary Dairy) got this Verus leather case ($(removed)) for his iPhone 6 Plus, and I liked it so much I bought one for my 6 Plus.
It protects the screen and I was able to ditch my wallet, too. It has three credit card slots and a pocket to hold paper money and cinnamon toothpicks.
The phone fits very snugly in the case. No chance of it falling out. In fact, I struggled to get the phone out to take this photo. It has a magnet in the clasp, making it easy to open and close. You can flip the cover all the way around and make it stick with the magnet, so it is out of the way. Buttons and ports are easy to access.
The leather scent is just strong enough to attract cats, a feature that's not advertised on the packaging.