It is pretty awesome, indeed. I'd say your issues aren't that big, though: 1. FAA is the toughest challenge, true that; 2. A good idea would be to use the roof

It is pretty awesome, indeed. I'd say your issues aren't that big, though: 1. FAA is the toughest challenge, true that; 2. A good idea would be to use the roofs for delivery; 3. To add to that, people will buy a membership just for the convenience of getting a lot of small stuff in less than an hour without leaving the house/office. Hard drives, screw drivers, nuts and bolts, stuff for BBQs, etc.; 4. Stealing them will likely end with them being tracked by GPS, found and fined, people will learn not to do it soon enough :); 5/6/7. I think the failure rate will actually be extremely low - quadcopters are very resilient, and we've already seen how amazingly well they can handle the weather, bumping into buildings and flying with three rotors - obviously, Amazon will have to go with the best hardware design; I think this could be big right away - as I said, many people want immediate delivery and with a subscription model, Amazon won't even have to ship all that often to start making money off of this.