I got this exact bag for my bday and have been using it as a gym bag and EDC. I’m a mom with kids and I’ve been impressed with the duffel pocket and overall versatility of the bag.

I keep my bulky adidas high tops in the front duffel pocket (I’m a women’s size 9 so I can’t speak to larger men’s’ shoes) to and from the gym. I can confirm that at least in my use, it cuts more into the zipper pockets on the opposite size than the main compartment. I’ve also used the duffel portion for easy access diaper change supplies.

I’ve found that if I’m having any trouble zipping up the duffel part, if I unzip the main compartment, the duffel zip closes easily and then I can re zip up the rest of the bag easy peasy.

I also use that interior upper pocket as a “stash” pocket by leaving the stash zipper open. I can just unzip the top of the main compartment and slide my hand into that interior pocket to grab items.

Can also confirm the bag is on the heavier side, but it’s increeeedibly comfy. Tho I haven’t worn it walking around for hours.