The only drawback: the highly sensitive power button! This can be useful if you wear thick gloves or have little mobility of the fingers from the cold, but it sure is risky because the torch is likely to come on at the slightest touch against a surface (eg in your backpack ).
Fortunately, they were thought to include the ignition lock option when the lamp is not used, but you should always remember to activate this block, otherwise you may find with dead batteries at the next Use ...
Charge is also very convenient, in the bottom of the lamp, you can find a micro USB port charging, connecting to PC, Mac, External Battery with a mini port, you can start charging.
Apart from this news, I recommend this headlamp because it is really very good and practical.