My experience with Nitecore has been 50-50. The Tip line has been sturdy enough. My thumb and one tube suffered the cracking plastic that the opaque plastic they use seem to be prone to. I have a Tini that the battery failed early on (6 months). My current tube has started strobing on high level after a few months of use. It has not been mistreated, hangs on a lanyard around my neck. I've replaced it with a Rovyvon that seems built better.