I've been using the headlamp a couple of months. I just finished a fishing trip recently where I used the lamp about 6hrs per night for a week.
I certainly plan to use this lamp during the fall, but it recently has been used for fishing and any place I needed portable light. I look forward to using the LEDLENSER this coming fall.
The functionality, battery life and durability are excellent. The one button system makes it simple to toggle through the different outputs and functions of the headlamp.
The MH8 proved to be 100% waterproof for about a minute when I dropped it i to the river. (I can't speak for full submersion any longer than that :D). We fished all-night long in the rain for two nights and never had an issue.
The charging system is both effective and simple, having the Ledlenser Powercase is an absolute must. The battery life was excellent and I never ran the battery out in any 6hr period.
Quick adjust head strap is AWESOME! Stop messing with the old-school adjustments. Just put it on, pull the tag end and you're tight. Easy to swap from on top of a hat to over a hood or to someone else.