This next generation of tubes (tubolito, aerothan, revoloop) might be a good thing for touring, since they pack to roughly half the size of standard butyl tubes. They are also said to be more puncture resistant, and much lighter.

Most reviews and comments I've seen are focused on weight and rolling performance -- I am more concerned with durability and air retention, compared to butyl. Have you considered/used them? Which brand and why? Happy or not?