I'm also a Prime addict, and have noticed vast improvements in the past year or so with Amazon Logistics (Bay Area). Just like you mentioned, it was really bad

I'm also a Prime addict, and have noticed vast improvements in the past year or so with Amazon Logistics (Bay Area). Just like you mentioned, it was really bad at first. Packages would routinely arrive late, wrong address, etc. I live in a gated apartment complex and they would always leave the package with the leasing office instead of using the code I provided (UPS, FedEx, would always leave at my door). Now it is indistinguishable from other carriers, in that all my packages arrive on time, at my door, without any problems. The only thing I don't like is PrimeNow, which uses 'part time' carriers like Postmates, and they ALWAYS get confused by my apartment complex - so I stopped using it.