Also, using parcel lockers can make a lot of the logistics much easier, and this might explain how allegro.pl could offer a Prime like service.
As for sellers, surprisingly not every one is providing this option yet.
edit: Notably some models of the parcel lockers welcome users with rather heartfelt messages - and count and show the short time it took to pick up the goods. Those trivial functionalities makes it so much more joyous to use.
[1] http://www.dlahandlu.pl/detal-hurt/wiadomosci/po-firmach-kur... "
Lockers are a great solution, the only thing better is having an employer that allows private packages to be shipped there.
I'm still not convinced that the Amazon logistics solution, leaving parcels at the door step of customers regardless, is such a good idea so.
It's almost like magic. :-P
From my own experience: extremely. It's the default option, everything else is considered only if the parcel doesn't fit the locker.