Only one item can be delivered at a time. It can’t weigh more than 5 pounds. It can’t be too big. It can’t be something breakable, since the drone drops it from 12 feet. The drones can’t fly when it is too hot or too windy or too rainy.
You need to be home to put out the landing target and to make sure that a porch pirate doesn’t make off with your item or that it doesn’t roll into the street (which happened once to Lord and Silverman). But your car can’t be in the driveway. Letting the drone land in the backyard would avoid some of these problems, but not if there are trees.
Amazon has also warned customers that drone delivery is unavailable during periods of high demand for drone delivery.
Or you’d have to 3D map your own local environment and keep it updated so the drones know where obstacles are when entering your property’s airspace
I would be fine with that. Looks like a big use case they want this service for is their pharmacy side. Get your teledoctors appointment via their app and the meds delivered via drone within the hour.