This is my personal favorite flashlight for now.
It has been to the top of several mountains and peaks, literally into an ice crusted alpine lake, across the Mojave in July, canyoneering up a river, through the NYC subway system, on patrol and SAR... no failures yet.
The blinky button light has not bothered me a bit even when waking up at 3 am in the tent to crawl out into the cold and relieve myself.
Having that much output is incredible for helping a couple buddies scale rock cliff to get down to a the Deschutes river at 10pm or to find a campsite marker hidden by 3' of snow. The warm tint makes it far easier to find dog droppings on the wet Oregon forest floor while out camping in the rain.
18650s are easily recharged by solar in a day with a lightweight panel on my backpack and the magnetic mount makes it easy to stick on most things to get some extra light.
The UI is even decent, I really can't ask for much more in a light.
Well worth every penny for serious/ professional light users and adventurers. And with a 20-30% discount that has happened with a couple websites it's a steal.