Fantastic!!I have a pop up 28, pintler and a crewcab. I also had and sold a woodsman. I ran the woodsman on both a 26 and 22 inch frame.
There are compromises either direction you go. Overall, I prefer less frame. The 26 was overkill for a daypack sized bag. Guidelight works but it is heavy and has some bulk. I didn’t like having lifters sticking up when I didn’t need them.
The pop up is the bees knees for me. Light, super compact. It doesn’t haul a load as well as the pintler but it excels in day pack mode. I have used mine on a 50# bag of corn and a #65 load of deer meat. It carried both fine.
If I were deciding between something like the pop up, which is a day pack with a hybrid fram or a pintler, which is a full size frame with a small bag, I would think about how often I would haul. For me, hauling a load 2-3x a year, I like the pop up because it excels as a daypack, which it is +90% of the time.
Only gripe I have on the pop up is that it is a tad small especially later in season when I start hauling warm clothing into the woods. If MR came out with a 40 liter pop up bag, I would be a buyer.