I am delighted with the 100AW I received as a gift 6 months ago. I knew the sling would be convenient for lens changes but I've discovered many more benefits of a sling bag as compared to a typical backpack:
- It serves as a camera stabilizer. I swing the bag to my front and rest my left elbow on it, making a chest-mounted monopod.
- When I'm sitting on a train I can put the bag on my lap without having to take it off.
- Museums with strict no-backpack policies don't seem to object to front-mounted bags. If I start to encounter problems, though, I can toss a white cloth in the bag and tell security it's a diaper bag
- It's easy to wiggle a small sling bag around on my back for a little bit of ventilation. Normal backpacks lead to a sweaty back.
The sling does have an annoying tendency to slip off my back on a bicycle. The auxiliary waist-level strap resolves that 100%.
I have found zero defects in the bag after 6 months of heavy use. The zippers move smoothly. Fabric has done a good job resisting dirt and scratches.