I have one.
Brightness....It looks about the same as a standard 65 Lumen SF to me, outside it isn't noticably different. Just tested it against a G2, A2 and M2. They appear brighter to me. It certainly isn't 2.3 x the power of a 65 lumen SF, judging by the white ceiling test ! (Hardly the most scientific, but all I have here and now)
What is noticeable, the 4 window/glass 'bustin' prongs, get in the beam and cause the beam to have a + shape to it, instead of the usual circular shape..
It's well made, feels substantial and is built like a tank. The clip is huge, the light is heavy.
Standard Tailcap click on half way for momentary and click on full for constant light, no twist on/off or anything fancy.
I like it, but as I don't have to smash car windows with a gun in the other hand, it's gonna be a shelf light, I think.
Alan