I use one every day. I took the measurements of the free arm of my machine and the dimentions I wanted the table to be and had a piece of plexiglass cut at the local lumberyard. When I got it home, I measured up from the table to see the height the legs should be and screwed 4 1x1' pieces of stock lumber and it is very sturdy, been using for about 5 years. I also makes a great light table.
Had to come back to say it cost $12.