I had an item sent by Express take two weeks to get to the other side of the country since it was sent over a long weekend period. Buyer didn't complain or open a case fortunately, but he did leave one star for Postage Time, which eBay removed since I had uploaded valid tracking with 24 hours of posting the parcel.

I still take that though as a lesson learnt the hard way. I likewise rang up Australia Post and the lady I spoke to admitted that I wasted my money with the additional express postage charge since a parcel between our postcodes would always only be sent as a regular parcel. Lots of stress and the end result? I now never use express AND I write in my listings that Express post is not available. The things I send can be sent as letters, so (under the current system) they usually only take a few days to get to the other side of the country. I've even sent one customer five large letters once to avoid having to deal with the stuff-arounds of fitting all the items into a super-slow parcel.