In Canada the "clusters" are called "super mailboxes". They've been here for a while, in subdivisions. Where I used to live, we had mail delivery to the door, and we had mail stolen a couple of times, not to mention it just being rather annoying (both to us and the mail delivery person) that our dog would bark when they came up the steps. The super mailboxes (at our new house) solve both those problems by (a) not requiring the person to be on our front porch, and (b) requiring a lock to open. When we get large parcels, they usually put an extra key in your mailbox, and that opens one of the large compartments where they can put medium and large boxes. That's convenient, and better than trying to leave it in an unlocked mailbox at your front door. As for having to "walk" to get your mail, it's only half a block away, and most people I see just stop their car there for 60 seconds on the way home. I pick it up the next morning when I'm walking the dog. Plus each one has a mailbox (for outgoing mail) built-in. Overall, I think it's a better solution, especially if it saves money.