Thayer H.wrote a review of Black Diamond Storm Headlamp on February 16, 2018
Familiarity: I've used it several times
Tons of light options (wide beam, spot focus, red, blue, green - all dimmable)
Good, solid construction
It's clear a lot of thought went into it
What I didn't like:
This headlamp is heavy. It's noticeable compared to others. I really think a lot of it comes down to the extra battery (4 vs 3)
I hate the PowerTap option. While I think it's a great idea to light up the night, I found that I kept accidentally hitting the button when I was carrying it in my hand (which I'll do say running to the bathroom in the middle of the night from my tent). I accidentally light blasted my hut mates in the middle of the night because of this. Perhaps a physical button (instead of touch sensitive) would be a better option.
Final thing, there is nothing intuitive about using this headlamp. You constantly have to mentally walk through the steps to get certain features working. Make sure you read them throughly and keep them on hand for a while.
I ended up returning it for the updated Cosmo (it's the next BD lamp without the PowerTap option). It's lighter and easier to use.