I had never seen this type of chair before moving to Senegal as an expat. For several months, I didn’t try them because I assumed they must be incredibly uncomfortable. To be honest, most are made from thinner wood (people here are really poor!), so they didn’t look very sturdy either.
But a few weeks ago, I visited a local woodworker and ordered one of these chairs. I had to let go of all my previous prejudices - this type of chair is surprisingly comfortable and stable. And it's even useful for certain "other" activities :-D