I think the My Pen System is a cool idea, but I've generally preferred keeping the original Visconti logo coin on my pens. However, I'd been eyeing the other MPS coins for a newer pen. My first choice would have been a gemstone, but the color I preferred was not available, so I took a look at this one in-store. It actually looks quite nice on the pen. Why not 5 stars? Just not sure $15 is a fair price from Visconti for this.