I have the 3L sling that's several years old now. I wear that thing all the time. It's my most used and favorite bag I own. I love the weather resistant materials and zippers, the padded strap, and the extra under-arm strap for three-point contact if I'm being active or in a place where I don't want my bag snatched. This new version of their slings is even better, specifically because they got rid of the velcro strap minders and replaced them with elastic. I snagged a few of my shirts with the previous version but this one doesn't have that problem.
I also like that the 6L can hold a laptop, ereader or tablet. As a non-photographer, I find this bag contains a bit more tiny organizational pockets than I need, but the main compartments are padded so I don't worry about any of my items being damaged. There are also movable/removable dividers in the main compartment.
All in all, I rave about Wandrd's sling bags to anyone who will listen. Can't wait to wear this one for years to come.