The X-Kat team says that this system has an advantage over the folding trimaran in that it is simpler and quicker to activate. I think the biggest advantage the cat has over the trimaran is the amount of deck space created by the connecting bridgedeck. The trampoline has been replaced with a folding, rigid floor. This is good. As comfortable as they tell you that trampolines are to lie on, they are hell to walk on.
Accommodations are minimal.
After all, it's only a 23-foot boat. If two pillows at the head of a berth make it a double, then the brochure shows a double berth drawn aft in the starboard hull. I think it must be for very skinny people or for one guy with two heads. But that probably goes for most 23-foot monohulls as well. The rig features a rotating mast and a loose-footed mainsail.