My first test for the Space Stylus was to write upside down.  I first turned the pen upside down for about five minutes then, still holding it upside-down, drew on a notepad.  The Space Stylus wrote smoothly like a champ, with no spotting at all.

The Space Stylus is also supposed to be able to write on grease and underwater.  I thought a better test would be to see how well the Space Stylus wrote on wet paper -- something that people need to do from time to time.  So I took some hotel stationary I had and ran water over and under it until it was completely soaked, then signed it using the Space Stylus (top) and a Bic Wide Body (bottom).

As you can see, the Space Stylus was able to write cleanly on the wet surface without any tearing, while a normal pen was spotty and tore the paper.  I also noticed that the normal ink smeared easily, while the Space Stylus retained its form without noticeable smearing.

The ink writes very smoothly across dry surfaces as well, and the clip lets you keep the Space Stylus handy at all times.  The thickness of the stylus and its weight make writing much easier.  I also noticed that when writing on a scratched or warped screen that the stylus made the screen seem much smoother and easier to write on.  Users who have a scratched screen may be able to get a little more life out of it by using this stylus.

Conclusion

The Fisher Bullet Space Pen Stylus is the most useful combination of pen and stylus that you can find today.  The ink pen can be used to write anywhere, and the stylus makes even a scratched screen easier to use at a reasonable price.