The Jagwire stuff cuts pretty cleanly with a conventional housing cutter like the Park CN-10. When I do it, there are usually a few cottony strands of the Kevlar jacket that didn't cut through completely. Maybe a better cutter like a Felco C7 would take care of these but I haven't tried it. The strands can be snipped off with a scissors, and I think a few times I even just fanned out and folded them back onto the outer jacket before stuffing the whole thing into an end cap. Overall it's less fuss than trying to get a spiral cable dressed nicely.

What I don't know is if it matters whether you should do the cut with the housing held straight, or curved into its final position on the bike. The curves I believe would cause all the parallel wires in the housing to shift relative to each other (which is what makes it compressionless) so the ends of the strands might not all lie in the same plane if you cut first then bend. Maybe it doesn't matter.