Amazon's last mile delivery is a significantly worse experience than FedEx, DHL, or UPS. I put their service about on-par with USPS, which is to say: full of people lying about attempted deliveries.

With both USPS and Amazon I get notified of successful delivery hours or days before the package actually shows up, or attempted delivery when I was home and nobody used the callbox. They're making a huge mistake by not prioritizing the delivery experience; it is eroding customer confidence and loyalty.