I have had one for some months now. Here is my after action report:
-As a Diver, I'm a fan of the "Sub - Dude" appearance of it.
-Excedingly well made.
-O rings to keep the cap screwed in place when closed, and another in the cap to keep it on the pen in the open position. Nothing loose or "Rattley".
-Rounded cap is large enough and wide enough for good purchase with your thumb
-Isn't stupid tacticool black with 37 knurled bands on it.
-Pocket clip is stout, and isn't likely to break under normal use.
-Large enough to be comfortable in the hand for actual writing! (no skinny jeans OR skinny pens tolerated here...)
-Refills are readily available.
I put it to the NPE test in November when I paid my property taxes. I walked to security, put my scribe and choirboy with keys in the bowl, and walked through the metal detector. No problems.
Buy one or several to add to your "war - drobe" 

NRA Pistol Instructor
HITS - 3, 8/12/16
CRG - 3, 8/13 - 8/14/16
RGF - 2, 7/15 - 7/16/17
CRG - 5, 7/7 - 7/8/18
Kalashnikov Rifle Gunfighting, 10/12 - 10/13/19
Advanced Kalashnikov Gunfighting 10/11 - 10/12/20
TN/GA/AL Training Group
"40 shots rang out....40 people fell. Patti and the Killer missed each other, but they shot that town to Hell!"
Cow Patti, Jim Stafford via Randy Harris
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