(Disclaimer: I've been working with Amazon for a while but have been a Prime member for much longer.) It's also the free shipping on any order that's important.

(Disclaimer: I've been working with Amazon for a while but have been a Prime member for much longer.) It's also the free shipping on any order that's important. It's free shipping on any order, whereas I think normally you need to spend at least $25 or $50 to get free shipping. This enables me to purchase anything on Amazon whenever I want without worrying about added cost and turns shopping into an almost entirely asynchronous experience. It's a huge time savings.