The Pilot FriXion Ball Erasable Gel Ink Pen has a good look and concept, but isn't right for everyone.

The new "thermo-sensitive gel ink formula" is easily erased with the rubber tail cap providing friction. The gel ink doesn't come out as easy as gel should, more like a regular ball point, and seems light or faded when you lay it down. As Pilot advertises though, there does not seem to be any damage to paperwork at all when it's erased, and because it's a rubber tip instead of a standard eraser, it doesn't seem to deplete at all.

The pen has a dimpled rubber grip and comes in standard black, blue and red inks in fine point (.7 mm) only. Because it can be easily erased, it should not be used for legal work or for any job that uses official documents that may be seen in court. On the other hand, it would be great for students who prefer pen over pencil and make a simple mistake here and there.