Assembly was annoying.  The material is good and very resistant to scratching / damaging as I dropped pieces many times onto the driveway during assembly but never noticed a mark.
They are more flimsy than I imagined a chair with a 400lb weight rating would be...  I have sat in many of adirondacks before and never recall them feeling this way.  HOWEVER I'm imaging the folding design of these chairs lends it to less solid.  If folding is a key aspect then these seem great.  In hindsight folding isn't that important to us so curious if a set of stackable / nesting chairs would have a more rigid feeling while still being feasible for winter storage.