I use this sponge for my big whiteboard in the office. By means of the magnets of the sponge to the panel hangs up and takes no place in the tray away. It is unfortunately a bit small, which means that it takes a while to herunterzubekommen the color of a large whiteboard.
To label I use bright colors (red, green, blue and black), the sponge away overall quite good. Only in black pen, I find it a little more difficult. All in all, I give four stars and a buy recommendation for small whiteboards.
