When experimenting with standing (well, also walking) desks I found that the height of the table is less important than the height of the monitor, and that using a plain laptop, as shown in the pictures, isn't any good if you want to work for longer (>30 min) periods. Constantly looking down isn't a natural position, and it strains the neck.
The cheap option is to raise your laptop and use an external keyboard/mouse, or use an external monitor. Or both :)