Pen: inferior, writes more gray than black.
One should ordinary pins to buy (eg Staedtler are in this board super).
Sponge: impossible "fast residue-free wipe"
You have (even with slight been suppressed spelling) mhermals touch it, .... but he's ok.
Try it now sometimes a "brand sponge".
Board + Magnets: super.
Sponge: goes like this.
Pin: no thanks.
