Rating: 5 / 5
This is the improved version of the S-1 - and it really is.
The only changes are to add a two-position tab to hold the windscreen, and making the windscreen a two-position circumference. The original S-1 was designed to work best with REI's Evernew .9L pot; the S-2 is a perfect fit for that pot in the smaller-circumference position, and for the Evernew 1.3L pot.
Simply elegant, and elegantly simple, changes make a great stove even better.