Comment by Zak

I suppose it depends on what you want out of a flashlight. It's kind of cool that you can flash the firmware over USB, but the rest of it is middling, and there are quite a few flashlights today running open source firmwares with exposed flashing pads.

Regulated, open source, flashable, USB-charging, and a standardized battery describes most lights from https://www.firefly-outdoor.com/