Reading through the comments, I had to remember why I returned my ULA Circuit. I had saved my return message – couldn’t reach the side pockets or the hip belt pockets when the pack was fully loaded, i.e., no snacks or water while hiking. I also had a hard time fitting my bear canister inside the pack, even vertically. They were great about the return though. But it speaks to needing to try on a pack fully loaded with your own gear, so you know whether it will work for you.
The ULA Circuit is a very similar pack to the Granite Gear Blaze 60, which is what I have now and like a lot. On the Blaze I can easily reach my water bottles and the large hip belt pockets are right in the front, very convenient. It handles a bear canister very well. Although it’s a bit heavier pack, it is nice for bigger food or water carries. I find that even when I have a lighter load, I still enjoy using this pack rather than switching out to one of the other ones around the house. Like dirtbag with his Circuit, I can hike a lot of miles with a fair bit of weight in it and not really have any back/shoulder fatigue. It just carries really well. I try to limit to 30 and under full weight, and ideally less than that. Depends on the food and water carries though.
I could lighten it up a bit and use a different pack for some of my trips, but I keep going back to this pack regardless of the hike. For example, I have a GG Crown VC 60 which is a full pound lighter. But it feels more like a saggy sack on my back, without the structure. I also have an REI Flash 45 which is a nice size for lighter loads. I wouldn’t put a bear can in it though, or carry 4 liters of water.
I’m still curious about the Mariposa, and also about the HMG packs, but what I have now works so well I’m inclined to make it last as long as possible. The only flaw in the Blaze I’ve found on many many nights of use, is that the side pockets would catch rainwater and hold it. So I visited a local place that custom makes tarps and tents and whatnot, and they put in grommets at the bottom of each pocket. Still to be tested with a downpour! (The place wasn’t even going to charge me – nice guys! I insisted on paying something, so I paid $10. Use your local craftspeople!)
Maybe it will be my last pack, my GG Blaze. I hope not though; I hope at age 59 I can wear the damn thing out and need to buy at least one if not two more!