I have used this headlamp In and around the house, outside at night and while kayaking. The adjustable brightness is helpful. I notice I use the wide-angle LED Most often. It’s quick to get to full brightness by double tapping the side of the unit. While kayaking, hi predominantly used the red light under a full moon and could see well. It is also lightweight, adjustable and comfortable when in use. The learning curve is minimal to learn how to switch within the modes, brightness, etc. The build quality is very good. I had an issue with an older model where the battery compartment broke when I replaced the batteries. I don’t see that happening with this model. The only reason I’m giving at four instead of five stars is that the rechargeable battery pack is additional. I didn’t realize that when I initially ordered it, but it did come with Duracell alkaline batteries.