I've owned this backpack (STM evolution medium) for a few months and I've only used it sparingly and have recently decided that there are backpacks or cases out there that would better suit my needs. This backpack costs $100 plus tax from the Apple store and is still is basically new condition. I'll post pictures if need be. I would be interested in really any kind of backpack that will hold a 15" MBP. I would also possibly be interested in some kind of sleeve that I could just put in another backpack. I'm not interested in a messenger bag.