It serves the purpose that I intend.  However, the variable height is something that needs to be determined before you put all the screws in place.  If it is screwed together, it would require 4 people to change the height, each pushing in the button on each leg while pushing or pulling with the other hand.  That's because you can't just move the height of one leg at a time.  There is no warning of this in the instructions that I recall.