Dropped it in a hot spring in the middle of the night. STAYED ON WHILE SINKING! It was in the water for a good ten seconds before I was able to retrieve it. I was so sure it was going to short out, but just kept on working! For the rest of the trip, it had a little issue where it would stay slightly lit when off (somehow redirecting the current intended for the indicator light to the main LED), but once it dried out inside that issue fixed itself. Works great with Lithium batteries, even in below freezing temps!
My only complaint is the button design... could be better, maybe more like the Tikka 2 Plus's. They're hard to find with gloves on, but easy enough to press (there's a lot of button travel to play with).
It still gets 5 stars though! After getting dropped in water and still going strong, it deserves nothing less. (I assume it will hold up to all the rain nature can throw at it).