Had a chance to play with one of these yesterday and I'm quite impressed...enough so that I would consider updating the Kovea. I love the little stretchy neoprene bag that allows the Crux to fit into the hollow of the gas canisters. Also I would think the design of the head on the Crux would make it a more efficient stove. Not sure.
I do love my Kovea...but has anyone had experience with the Crux? I had a feeling Corv had one but might be wrong?