Middling to cheap construction but a brilliant, highly space efficient and  versatile design. These things have been around for a long time for a reason. They're easy to stow and move around and they cover a lot of bases with little fuss. There are more stable platforms that you can buy. Or you can build them using this workbench. Great choice for a 1-bedroom apartment or a cramped garage but I imagine it could come in handy in almost any work environment.