I have prime and I'm just kind of 'meh' on it. Usually the things I order new would qualify for free shipping anyway (I rarely order less than $25... But that might change when I move away from home next year) and I try to order my books used (especially textbooks) so I have to pay shipping anyway. It really depends on what you order and how often you order. I don't have an e-reader so I can't comment on that.