I've seen several of the prototypes over the past seven months. Each version is more refined, correcting deficiencies, like the yet to be removed wholly unnecessary dump at the butt. This rig shows promise. Edd dove it with Genesis HP100s and two stages. I imagine the casual diver will rarely need to carry more.
Personally, I dive the SMS75. The more dive it the less I like it. I value opinions from experienced divers, like Bamafan. He dives the Armadillo, and I really want to try one in the water for cave diving steel tanks and a couple stages.
I don't see one SM rig doing it all. I'm really looking for a new NoFL cave rig, and warm water rig. The Katana my fit that bill. I'll definitely give it consideration. I would like a couple dives in a wetsuit, with Al tanks, before purchasing.