Ah, the migrate is similar, there is no framework and you have to pack it accordingly. I prefer the lack of weight to having a frame. I pack my fins lengthwise on the sides and then pack in between them. The fins form the stiffeners.I have the No Matter What Rolling Duffel and I'm not happy with it. No support in the back means less weight, but when pulling it, much of the weight transfers to the handle and it ended up being quite a bit if effort to pull it any distance. Also nearly impossible to get it to balance upright. Now looking for a bag that will roll more easily.
It is a 110L rolling duffle that weighs 4 pounds. It also has backpack straps which come in handy with a lot of train platforms.