I agree that they make great bags. The WaterField Sling is still one of my favorites. I also use their zippered pouches in every bag that I carry.

I also feel that those voluminous cargo bags encourage us to carry far too much with the feeling that if we carry the gear, it must be necessary. I use a WaterField medium sized Vertigo, and periodically empty it and evaluate what I am carrying.

Saves the shoulder and neck.