The improved ergonomics makes this much more comfortable than other Adirondack chairs. Trust me, I had to sit in A Lot of chairs for research. Also, it has a much more rigid and stronger back brace design for some accessories that will be added to the next few production chairs. It's built to last until you want a new one.
There are quite a few other projects in the works as well. More to come on the cast iron bench, salvaged barn beam bench, collapsible shooting target stand, door to table #9, and many, many more.