What is all of your experiences with tempered glass screen protectors? I'm kind of skeptical about whether they really shatter instead of the glass of the iPhone, it seems like it could still break the screen too. I want to get a slimmer case for my iPhone, the spigen thin fit in black for my iPhone 6 space gray. However I wouldn't feel comfortable with screen protection with that case, so I'm considering tempered glass but I'm new to it. Anyone else use this combination of accessories on their iPhone? Would you recommend it? What would be the best glass screen protector for me to get if I choose to use one?