Bought 2 blue titaniums - I love this light.
One of the two had a tailcap failure for no apparent reason. I learned that Massdrop doesn't support this product and neither does Lumintop, with many unanswered support emails.
Seeing all the people with problems, I would strongly advise everyone to not buy anything from this manufacturer, and I wonder if I should buy anything that is not a US name brand from Massdrop at all.
It is a shame because I think that both their AAA and AA lights are the best (functionally) around.
VR_Latte100% agree. Worst customer support I've seen in a long time. I bought around 10 of these lights in a mix of blue titanium, regular titanium and brass. 3 were sent with the wrong LED. After all the failures I stopped giving them away as gifts. If you can't trust a flashlight to work when you need it it's just a paperweight on your keychain.
Olight I3E EOS, Fenix LD02 (original version, but now discontinued) and ancient Fenix LD01 are all better choices if you don't want to worry about whether or not your flashlight will suddenly stop working just when you need it.