NYA-EVO backpacks definitely ARE good backpacks. I can confirm that the 36C does have an aluminum frame. This backpack is medium sized and I consider it somewhat similar to a day pack in size, but a very robust one at that. I don't carry a tremendous amount of weight in it, however two Z8/Z9 bodies and two f/2.8 lenses and accessories is not all that light. Also, the interior volume somewhat limits the amount of weight you can carry, so the harness system is designed well enough for that type of load.
For me, the padded shoulder straps and waistbelt are sufficient for distributing the load between hips and shoulders for a bag this size. It's plenty good enough for what this backpack was designed for.
If I want a more robust hiking-style backpack, I take my MindShift Gear Elite 45L backpack (
MindShift Gear BackLight Elite 45L Backpack). It has a much more robust carrying system (shoulder straps and waistbelt) and can carry a lot more gear as well. It's still a camera backpack and not an elite hiking backpack, but it provides a solid frame and weight distribution system for comfortably hiking with a lot of photo gear.