Does anyone personally have experience with using the lifeproof fre on their iphone 6 with one of those plastic screen protectors that are really thin? I dont like the thought of the bare screen of my iphone 6s in a lifeproof fre even though it comes with a built-in screen protector. I have a Spigen Crystal Clear Screen protector that I want to use with the lifeproof fre, but wanted to get a first-hand account of someone who has actually used it, and deemed it either compatible or not-compatible. Opinions from others are welcome as well. Thanks.