For those that have used the official iphone leather or silicone case in the past, how do you feel about the about the bottom being exposed? I love the blue leather case I got, but I am concerned it may get marked up over time, I usually use a full case, also have the TUMI case right now. Has anyone dropped their Iphone 6 or 6 plus and does the case protect it for the most part on the bottom there? I usually never drop my phone, just my OCD kicking in. Thanks!