Usually a pair of screw adjustable feet is more than adequate. I will admit this works great though, if you want to just set it down on a table sitting partially on some magazines (again but why?). Clever, true, but necessary?
Seriously though, there is no "center" point resistance, so that you can start with the assumption that your table is flat. As a result I found myself wasting time trying to get it level. No way you can eyeball it without projecting an image onto the screen.
That said, it's all very straight forward to set up.