I bought 3 units of this product mostly on the strength of the first review and I can put it as simple as this... "Wow". Yep, that good. I have a pack of 7 large breed dogs and because of work commitments have no choice but to walk them in the dark of winter, night and or morning. As well as road walking we exercise our dogs in nearby cow fields and wooded areas, treacherous in the dark with rabbit burrows, mud slides into the river and pot holes etc. (probably dug by one of my own dogs the night before!). This head-torch is the perfect solution, comfortable, lightweight and well balanced. Subject to adjusting the angle of the torch head you get a nice concentrated spotlight about 4 feet in diameter about 5 to 6 feet in front of you BUT you also get more than adequate peripheral illumination too, which when walking a pack of dogs is perfect for keeping your charges in vision. I can't comment of battery life as I've not had them long enough but for my purpose (as described) I've got to give this product 10 out of 10 in all respects.