Just in case this helps visualize, here are a couple quick o ring pics. 3 in the main compartment and 2 about midway down on opposite sides of the outside slash pocket. In terms of the strap comfort, I think those straps should be comfortable with a reasonable load. The one initial impression I had is that the pack will be less forgiving feeling with pointy objects against the back panel, due to its lack of cushioning and/or depending on the owner's tolerance for feeling pointy objects against his/her back. I will try carrying it to work today, so I will have a better idea soon.