As noted in many other reviews, this laptop bag is NOT a carry-all one-size-fits-all. From my use over the last 5 months I find it works fantastically as a laptop sleeve++. It holds everything I need to work from a coffee shop, or a quick trip into the office. However, it is not a replacement for a backpack or full-sized shoulder bag.
The stiff backing materials used on the outside of the clamshell, and the width of the material around the zipper will discourage you from zipping anything bulky into the case without straining. This has improved over time for me as the materials has loosed with use, but you may have to choose *which* accessories you take with you.
I have the Small bag and pack the following:
Macbook Pro 14 Inch, 14 Inch portable monitor (slim ~5-8mm thickness)
Macbook charger brick and cable (fit depends on *your* charger)
Spiral Notebook and Pen
Battery bank, and variety of USB Cables
Earbuds, External SSD, and Collapsable Mouse.
I can fit a full height mouse if I'm careful with the zipper, or comfortably if I remove the notebook. I have an slim external monitor, which fits snuggly, but closing the zippers needs a care not to jam them.
There *is* an special spot for an Airtag like the other LTT bags (the location is left as an exercise for the reader).
*Updated to 5/5 since it does fit my whole load-out after all. (With a new slim external monitor)