I am very particular about my back packs. I do not want a cavernous pack nor do I want one that doesn't fit all of my tools.  This one fit everything I need and nothing more. It is very well constructed. It holds my macbook I pad and all necessary chargers. I have a small digital camera a few pencils and pens. a file folder or 10.

I always prefer a sling pack, as it doesn't effect my shoulders and my posture.

Two adjustments that would improve it would be a larger area for sunglasses, my oakleys  don't fit. and a mesh water bottle holder instead of fabric.