I got a couple of the Massdrop Brass versions back when they were still using Nichia 219B. I’ve had nothing but good experiences with mine. It’s become the gold standard by which I judge other clickly AAA flashlights.
Then I started seeing a lot of negative reviews and didn’t understand. I don’t know if something changed with the Brass. I ordered an Aluminum version with 219C to save on weight last Fall. The button was terrible. It was spongy and hard to press properly. It was much different than the button on my brass model. It would also occasionally flicker and turn off. I could have tinkered with it but I just sent it back for a refund.
I’ll be curious to know how things turn out with your current titanium model.