La Chica's skipper recently sold me an 'as new' composting toilet with which I am happy.
My Naturehead loo is something quite new, and a very nice way to do a poo. Compared to the last, that 'blast from the past', the human manure breaks down really fast. Between sawdust and moss it is hard to know, but this coconut fiber is fine don't you know, no smell in my cabin, no pong in my head, I can safely go happily off to my bed. But with company on board, the pee pot gets full, more quickly that normal and that's really not cool, but compared to the last, that blast from the past, I can empty my pee pot without spilling at last.
As David says, I am not sure if the coconut fiber is the silver bullet. I think it comes in various grades and the one I have currently is relatively fine grade. I haven't let the box get more than half full yet, because it seems to get more and more difficult to crank. round. I am sure it won't break, but the last thing I want is a broken crank in the poo box, even though it may be nicely composted.
I am amazed that there is absolutely no smell, except as David says, a faint musty aroma every so often. It is simple to use, easy to keep clean and easy to install, dismantle and empty. If anyone is interested in designing another model, a separate holding tank for the liquids would be good and a sealable opening door to empty the composted solids l, as you would ashes from a fire grate, would make life just that bit easier.
I think Naturehead and AirHead are more or less the same, the only difference being that Naturehead has a fixed seat, therefore less moving parts and easier to maintain, but maybe not quite as aesthetic as the Airhead. It is pleasing to have an aesthetic thunderbox and I am thinking of painting mine gold.
Roger, on Shoestring.