I considered investing a small amount in them when they were raising a round from customers since I loved the search product so much. I too can't imagine going back to anything else, especially now that I have prioritized and blocked domains set up perfectly and added lenses, and this stuff works across desktop and mobile!

I've been mildly regretting not investing up until 5 minute ago when I read about spending 1/3 of that on the t-shirt factory.