Originally posted by pxpaulx I have a larger case logic sling (dcb-308) which I like - they are well made, my only complaint is that when it is completely full the strap is a little on the thin/cutting end of the comfort scale, but that is absolutely stuffed (d600, 70-300, 85mm 1.8, 50mm 1.8, tokina 16-28 2.8, 10 inch tablet and a bunch of other things in the top pack, probably pushing 20lbs) - but that is on one strap too.
What I carry in my airbac;
In the lower portion I have my K50, Sigma 17-70mm DC Hsm macro. Tamron SP 90mm Di macro, Pentax DA 55-300mm wr. Pentax 18-55mm wr, Pentax 50-200mm wr.
Upper portion Pentax smc-f 35-70mm, Ricoh 50mm F2, Ricoh 50mm f1.4, 72mm multi filter case, multi close up filter case, filters, cables, manuals, extra lens hoods, Rocket blower and a bunch of other stuff, also in in the side and front pouches. so also pushing around 20lbs. The straps are well padded and with the inflatable lower lumbar air bag, which by the way can be deflated and fit in a water pack with drinking tube, it is completely adjustable for personal comfort. .
I grew up taking 10,20, 50 & 100 mile wilderness hikes so i know the benefit of a comfortable pack and adjustable weight distribution as normally I would carry between 25 to an excess of 50lbs. For that kind of comfort there is usually a price tag to go with it.. I took a 5 mile up and down trail hike with my full gear and Manfrotto tripod today and could barely feel the weight, which is how it should be. That is what this pack is designed for, less weight on the shoulders and the feeling of carrying less weight.. With any other bag I have owned I would have had to cut the weight by carrying less gear just to get reasonable comfort. At 66 years old to me this is the most comfortable camera bag I personally have used especially at this price range. Are there others that can be adjusted comfortably, sure but I don't believe so at the price these are.
BTW. I do keep a Lowerpro 202 AW sling bag usually for in city jaunts when I want to go light.