I have one at home AND a PO Box. The PO box is going at the end of this month - Australia Post is charging too much for stuff-all benefit to me. A waste of money. There is a paradigm that anyone who needs PO Box must have something to hide.
I had a PO Box for many years primarily for business correspondence and even though I was able to claim it on the business it was becoming way too expensive, and also hassle to check every few days. The only thing it was handy for was when I moved houses but stayed in the same area, this meant I didn't need to notify many customers, suppliers or government agencies about a change of postal arrangements.
A funny and true story about our previous postman.A few years ago I was standing in the kitchen looking out the window and noticed the postman off his bike and kneeling down in front of our letterbox, he was there for quite some time so I went and opened the front door and yelled "is everything okay", he replied " I think I put the wrong letter in your letterbox".
I grabbed my keys and went out and asked him "why didn't you just knock on the door and ask for it back", he then stood up and gave me a puzzled look and I noticed in his right hand a bent coat hanger with a blob of Blu-Tack stuck to the end.
At that point I was thinking to myself....really?, is this standard Australia Post issue?....I then realised that this explains why my mail keeps going missing and why I keep receiving mail from different streets, he has just confirmed my suspicions that he is a complete moron and probably illiterate to boot.

He then replied whilst proudly showing off his poorly engineered recovery implement "once we put it in the letterbox it is illegal for us to get it back out". Anyway, I opened the letterbox and gave him back next doors letter and then gave him an ear full about concerns for my mail going elsewhere.

He apologised and I felt a bit sorry for him but later that day changed my view and reported the incident to Australia Post, they confirmed that he was commiting an offence by attempting to recover the letter in that manner. I never saw him again, but I did see more mail in our box from then on, addressed junk mail mostly.