The modularity of the system is fantastic. You can pack a lot into a very small space, and the system is designed to fit under an airline seat sideways (as long as you don’t have side pockets equipped). Upside: so many pockets… color coded zipper pulls are a nice touch. Multiple sections make it easy to organize things and grab only what’s necessary for any particular trip. I also really dig the passport pocket. Downsides: the front cap with the backpack straps is… not great, especially if you have a CS2-Tall section (which fits a 16” MacBook quite nicely) or multiple center sections - adjusting the straps to where it isn’t hanging halfway off your back is difficult, and when you get it snug on your back, you can’t remove it from your shoulder without undoing the strap buckles. And even then the bottom of the pack is riding just above the belt line and pinches. Needs a better lumbar cushion, and more padding in the straps. I expect that the primary clientele of pilots doesn’t use the pack straps very much, but us non-aviation users do, and this module needs some more design refinements. The main handle is robust and bulky, but not particularly well suited for carrying, as it’s not particularly ergonomic, and more intended for hanging off a luggage hook. Wishlist: - Velcro panels on the back pockets of the pocket cap, for name tapes, flair, morale patches, etc. - another pocket for glasses or the like on the upper back side of the tall CS2 - dividers for the CS2 and CS3 - small and well-hidden Velcro pocket inside the pocket cap for an AirTag. - a store at DFW that is accessible to the public and open on sundays!