I use this in my office (well, the Korean replication that's still sold). I firmly believe that good chalk on an enameled steel chalkboard is far superior to a

I use this in my office (well, the Korean replication that's still sold). I firmly believe that good chalk on an enameled steel chalkboard is far superior to a whiteboard: it always erases cleanly, the ink never runs out, it writes with high contrast, and it's immensely satisfying to write with. The only downside is chalk dust. By contrast, the cheap chalk the department buys for us is terrible. It squeaks, it snaps, it refuses to erase cleanly. And our conference room whiteboard markers are always dried up and don't write clearly. I have yet to turn into an illicit chalk dealer, though.