After trying a number of packs, the SO has worked best for carrying heavy loads for me. I've used it a number of times with weight in excess of 100 pounds (measured on a scale) and it worked far better for me then the other frames I've tried (including Kifaru). They are light years better in day pack mode, I barely even notice that I'm wearing it.
I'm not a huge fan of how their bags attach, but I've modified mine to make them work better for me. I also really wish they would come out with a better small organization/compression panel that was waterproof. The talon is way too small and the Merlin isn't waterproof. I'm in the process of designing a small bag for Pods8 to sew for me, but I'd rather buy something off the shelf. Other then those 2 complaints, the SO system is pretty solid and I chose it after buying/returning a number of different frames.
I'm not a huge fan of how their bags attach, but I've modified mine to make them work better for me. I also really wish they would come out with a better small organization/compression panel that was waterproof. The talon is way too small and the Merlin isn't waterproof. I'm in the process of designing a small bag for Pods8 to sew for me, but I'd rather buy something off the shelf. Other then those 2 complaints, the SO system is pretty solid and I chose it after buying/returning a number of different frames.