I really like my Olight h2r in the 'warm white'
The turbo setting of 2000 lumens is insane, but short lived and the battery eventually decides it can't support it.
The strap is good lasting longer than the Nitecore.
Issues might be the magnetic tailcap sticking to various undersides of the vehicle when sticking head close to steel.
same magentic charging base/cap is great though, wave the end of the light near the charging cap and snap, its charging.
i did not think this feature would be desirable, Was used to removing and replacing batteries and perfectly ok with it on my failed HC-50, but really enjoy it.
Olight has a new 21700 based headlamp out recently, the perun2
Only other experience I have with similar power head lamps, was the nitecore HC-50, which became intermittent, and chewed through the 3400 mah batteries faster on high, ~565 lumens
Check out candlepower forums
www.candlepowerforums.com
The H2r on high, not turbo, on my head, Beats a 2400 lumen light placed in the general area of work, but both is best.