I agree that you should be able to allow your phone to charge overnight, and should be able to use rapid charging - but that is presuming a problem doesn't arise. There have been several cases - certainly the vast minority - on these forums of phone batteries bursting, failing, and even destroying the phone. In these cases something apparently did not work as designed, and that can happen with any technology. It comes down to how paranoid you want to be. I personally won't use rapid charging because I don't need it, so can eliminate some risk. Same goes for overnight (read unattended) charging - I avoid that by charging before I go to bed. Lithium Ion batteries are dangerous if breached and exposed to air, so charging needs to occur in a way that is controlled and does not exceed specified temperatures.