Very well made with plenty of storage for day to day items. Pairs well with Errant pro

Loving the Aux Compartment. Super modular way to add a little carrying capacity to the Errant when you need it. Looks GREAT. Also works perfectly as getting inside to the bottom of the Errant takes a bit more, so for those things you reach for a lot can store in the Aux.

I had some concerns as I had seen past iterations of the Aux where the G clip would pop out from time to time. I guess Boundary listened to customers and add a closure to the G Clip so this is no longer an issue.

I purchased this Aux Compartment to compliment my Errant Sling. This small little accessory adds a surprising amount of extra storage space to your bag. I can even fit a 32oz Hydro Flask in the main compartment. It easily attaches to the outside of my Errant Sling whenever I need the extra space and I'm able to detach it just as fast for when I don't need the extra bulk. The strap that comes with it is also nice because you can carry the bag over the shoulder on its own. Although I have not used that feature yet I like that it is available.

Happy for the most part. Front vertical zippered compartment limits access.

simple and enough for daily commute !