I'm still discovering just how versatile the RS Convertible Carry-on that I got earlier this year here from the online spring sale is -- just returning from my first use during winter,
and i was able to shove my winter coat into the inside-the-lid pocket along with a nearly dry pair of supplex shorts/bathing trunks, but with the coat inside (I know, I could have worn the coat on to the plane and then stuck it in the overhead beside the bag but I wanted to experiment)
the bag was a skosh too Santa-waisted to make it into the overhead bin the usual way, feet first on its back. So i turned it sideways (not crossways but sideways, I know there are some here on the forum who have strong feelings about proper overhead bin etiquette :=)) and it made it in, snugly. The box of cherry cordials I'd tucked in last before closing the zippers came through unsmooshed.
The zippers have been one thing about the bag that wasn't working completely smoothly for me, and i realized that I should keep the outside cinch straps completely un-cinched until I have the zippers closed first, so that has helped a bit with the fussiness of the zipping.
The outside side pocket that Rick says is perfect for the laptop is indeed easier for getting through the security line, but I'm realizing that leaving the laptop in that pocket really throws the center of balance off, making throwing out one's back more of a danger, so I'm getting in the habit of taking a few moments after clearing the security line to open up the bag and move the laptop closer to the bottom (toward my back when wearing it) and this helps overall portability.
I'm willing to open the bag there because since I'm now using some kind of packing cubes there is less mess to fiddle with in a higher traffic spot. I'm still too cheap to get actual packing cubes, but my dollar store sells sweater storage bags (18 x 12 x 3 inches) in two-packs, for yes, a dollar. Two of those, a cords/chargers bag, a couple of clear ziplocs, and the included RS pouches make for a pretty tidy interior. True, the sweater bags wear out after just a couple of uses, but that still means I can take more than a dozen trips before I reach the cost of packing cubes.
Things still needing resolution for me are how to get thicker socks (et al) to dry quick enough, and the general problem of having a spot to put the bag down that isn't going to get it damp/muddy/gritty.