i have both the 29 and the 35 and there is difference in relative ease of closure between the 2 sizes imo. The 29 is easier to close because it has a strap holding the bag up. The 35 has no strap and I find it much easier to close when it is resting on a flat surface. I use the 35 for meetings, not when I’m running around making a lot of stops, so the fact that I have to rest it on a surface before I can close it has not bothered me. It’s usually sitting on a chair next to me so I can pull stuff out of it easily if I need something during my meetings.