Those are the standard long pocket, top zip... top zips are nice because you can literally CRAM stuff into them. I have fitted them with a golite shangri-la 3, a poncho, and some OR expedition gaiters and still had room left. I have also packet all food for 5 days into 1 (using freezer bag cooking and similar recipes to dine with) during the hunt... however it was a bit heavy and I felt it to one side. I anticipate I will be able to fit the new supertarp annex and woobie into one, give me till about mid May (if still stateside) to find out since that's the anticipated ship date for the supertarp, annex and small stove.. CANT wait for this little combo.
The molle ex would be a great good/ decent weather weekend pack "IF" you either have a small shelter and sleeping bag or you add a pod for the sleeping bag. Being I have 2 medium pods, its great for my Wiggys bag. Add the bear canister to the rear in a med pod, then toss the bag in the pod in the bottom and still have room for the longs... or just place one to each side, the options are endless.... I want to try and squeeze a few extra hundred out of my paychecks and purchase a molle ex and mod pod to replace my Max Condor II GHB that I keep in my car. Yeah the condor works, but on the last experiment trek of @16 miles (partially paved, or improvised roads) after work on a Friday to a family members house in Grantsville Utah.... it was not much joy. Besides the condor feeling like I was carrying a bowling ball in my back, I felt every step. I would gladly double the mileage to carry the load in the molle ex its that comfortable. the photo I hosted that shows it on the hill that day weighed a little over 35lbs and it was without the waist belt, @8 miles, and I felt GREAT... even a few jogs across the intersections on yellows and my body did not complain. Really have to experience it to enjoy how these packs can feel. If I could have had one, AND used one, in my days as a Marine I would have been a great deal happier, alas that was mid to late 90's and no joy was to be had...
Of course if you need to pack cold weather gear or you have a metric shit ton of equipment, your results will vary but I can see many living out of a molle ex and a pod for a weekend easy. Only down fall to the molle ex is the lack of belt that cost about $50 extra.... just a little extra you need to concider... or you can do the 2008 G1 gear at discounted rates and add the belt and be WELL under a new G2 gear MEx just click...
https://www.kifaru.net/2008MG.html you will have to compare if the G1 vx G2 features are worth the extra dough for you, but at 30% off its hard to beat!
As for the med pod thing...
https://www.kifaru.net/images/melEXP7.jpg here is the famous model from Kifaru showing off possibilities for the express.