Bought one of these a bit ago, nice price here on AP. As the description mentions these little babies are the perfect size, you can catch quite a few tags with it too.
The best part about the Pentel Presto is the combination of a metal tip and a squeezable body. You can write on practically any surface (except of course very rough surfaces like concrete) and the squeezable body allows you to write pretty fast. In my area, are very very popular. Great for electrical boxes, signs, and any plastic surfaces.