I've always had a screen protector on my phone, on my 3g and my 4. I'm reconsidering it as my current one has started to peel off and I dont' really want to spend money on a new one, plus the feel of the glass is much nicer than that of a screen protector, but I also want to protect my phone the best I can from cracks and scratches. Anyone have any input as the how well the screen protectors actually work for them? I'm typically very careful with my phone, and always keep it in a case, but if the screen protector really is going to help I will go get a new one. What are your thoughts, yes or no on a screen protector?