I picked up my sling pack at the post office and immediately put it to use. The (boxed) case for my iPad and two other packages fit in easily. As I ran several errands, I kept adding things to the pack. Everything, including my purse, fit in comfortably.
The designers at Thule have thought about just about everything. There are more than enough compartments for you to organize your cords, accessories, and maybe a book or two. The case is reinforced, so you can lean back with it still over your back and not worry about cracking anything inside.
The strap is wide and well-padded. Very comfortable. In fact, the whole pack is strategically padded for comfort. Not only does it adjust - good fit for short people - but there's a velcro tab to keep the excess neatly wrapped. An external zippered compartment on the strap, designed for sunglasses, will be perfect for my house keys and MetroCard.
The look is sleek enough to be appropriate for professional events and rugged enough to withstand travel and rain. I'm currently juggling my belongings and a cane, so I really appreciate the easy access and the lightness of the pack, even when fully loaded. I also like the extra handle that allows you to carry it in your hand. The only possible problem with this product is that it does not seem possible to wear it over your right hip. Still, it sits firmly enough on your back that this shouldn't be an issue. It's the most comfortable and functional pack I've ever owned.