In Poland, one company set up automated package drop points ("paczkomat", portmanteau of "paczka" - package, and "automat" - automaton, machine) in pretty much every big and small city. Couriers deliver packages to them both in the morning and in the evening, and you can pick them up 24/7 with no human interaction required (you get a one-time password via e-mail and text).

This is godsend for people who work standard hours. I buy on-line quite often, and whenever (90% of cases) there's an option, I pick up a paczkomat on my route home (big cities have a lot of them; mine has something around 50). If a particular shop doesn't offer this type of delivery, I order it to work.

Sadly, post office is no longer an option for me - they work standard hours, and only during Monday - Friday, which makes it hard to pick up anything there. In other words, I have to come late every time something big from Aliexpress comes.

EDIT:

> What I don't understand, is why I can't pick my delivery slot for free.

s/free/a fee/, and I think it could work. For large enough values of "a fee".