The fact that they upload ebay checkout addresses and print them (no misread hand writing or errors writing address), along with crosschecking suburb and postcode match, reduces most lost or delayed post.

The 15 day investigation rule is more to allow for stray items to be redirected or RTS than actual normal delivery time.

Over counter scanning is more secure, but street lodged is still way more secure than the old prepaid system, and often worth the convenience.

The fact there is tracking discourages opportunistic INR claims.Reduces a lot of when did you post emails

Overall C & S is better value than other forms of post in regards to cost/convenience /security, for moderate priced items.