I'm loving this headlamp! I've been using it for about a month now, mostly for getting my gear together before turkey hunts and doing a little testing on the side. I definitely plan to make it my workhorse come deer season. I was worried that the output was too low for blood tracking, but the lens enables you to focus the beam into a good strong light that is going to do the job well. The functionality of the button to change between colors was a little confusing at first, but it's simple to operate once you figure it out. I haven't needed to recharge it once, though I haven't had the opportunity to see just how long it takes to burn it out. But the battery is lithium so it should be more than enough for a lot of use before the charge, especially if paired with the case which keeps it at full charge all the time. I'm also pumped because this thing is much lighter than the cheaper headlamps I've used and the battery is within the lamp housing, so this one can't go bad from the power cord getting yanked when I move through brush.
The power case is really handy to have around as well. It can put a full charge on my phone and keeps the headlamp in full charge, so it has been especially useful when I'm burning lots of phone battery using my GPS and what not in the backcountry.