At first I was surprised how small it is, but I quickly discovered that one reason or talking at a meeting wonderful can play with it, to extremely discreet.
When the cap he is been attached size of a standard recorder, but remains slightly thinner.
I have said in temperatures (-30 - 200 degrees) not (yet) written with him, not even under water, upside down or in the universe. He is namely all can. I have in angetestet on damp and greasy paper and have to say the thing just write as if nothing had.
From writing here I find him well, there are pens which better but slide here like this by the handling of which I find very pleasant.
By design, the Space Pen is great. The chromed aluminum look very sophisticated and durable. The cap sits on safe and there is a wonderful, extremely pleasant metallic hollow "ratcheting" sound when you remove the cap.
I'm yet to see if he was really at least 3x longer holds as a normal ballpoint pen.
Buy recommendation, especially for people who would like to write something special.