I fooled around with the Nextel for a few minutes yesterday. My impression is mixed. With the xc116, after torching a section to cherry red, I opened it enough, using a small phillips screwdriver from a mini screwdriver set, and swaged the inside out enough to slip a 3/32" wick inside it. I only sleeved the part of the wick that would sit above the deck, and under where the coil was going to go. I installed the coil in the RBA, and wrapped 32ga kanthal over the Nextel. I wrapped it snug, so that the wire was in contact all the way. When I fired it, there were no hot spots. I primed it with some juice, and filled the tank. I have to say that it wicked well, and kept up as I vaped. Nice clean flavor. No metalic taste.
However, it is a little finicky to work with. It frays very easily. Difficult to cut. In fact, it shouldn't be cut until it's been torched. Torching it stiffens it up. I've read where some folks are working with it after soaking it in PG or VG, to keep it damp. It elimiates the fraying, but it's messy.
My feeling is, it's a viable alternative, for those who are having trouble with ss mesh and coils. With the Nextel, there simply are no hot spots. For me, I've been pretty successful at setting up gennys with just mesh, so it's not worth the extra steps.