I use it every day during my working week to carry pens, washi, stickers, page flags, cables, tampons, lipcream and various bits of paper. When I fly with little M, it will hold our passports, mobile phones (yes, he has an old iPhone to play on - just on flights though!), tablets, headphones and other bits and bobs.
I could go on but will instead let you watch me load it up for various occasions!
By the way, in regards to care for the leather, I just sprayed it with Collonil before I started using it and though it's not being babied, there are no stains or scrapes on it.