I've tried Kagi the last two or three weeks and the page speed is a nice bonus but the real advantage it has over DDG and Google is that it does find the pages I look for, rank them reasonably well and doesn't mix in pages that doesn't contain my search terms.
It is just like being back in 2007 or something when Google worked this way and it is wonderful.
I've used DDG for the past few years and I still hope they too will succeed, but with DDG the quality is the same or (slightly) lower than Google and the bang operator comes in handy many times a week.
With Kagi I only think I have used the bang operator once (yes, they have it). It is that good: when I look at the results I know immediately that there is no way Google or DDG can do it better except by pure luck and also my results are already there on first or second try so why bother shopping around?
Bonuses:
- bangs work like in DDG (I think, I don't use them anymore)
- doublequotes actually work unlike in Google and DDG
- even without doublequotes it doesn't stray very far from my query
- I can add lenses (?) or something (I have not bothered yet, the defaults are good enough)
Yep, I'm a walking billboard now, but I'm not paid in anyway and don't know any of the people behind kagi, it just happens to be the biggest improvement I have seen since Google replaced everything else sometime around twenty years ago.
Edit: yes, it is a paid product but it is free during beta and so good that I would consider Kagi gift cards for friends in tech if it was paid, just like I'd consider gifting WhatsApp subscriptions before Facebook bought and subverted it (yes, I was considering worse words).
Edit 2: I'll do this for your product too if I love it. I did for WhatsApp and Google+ and in real life for the insurance company I have used the last few years.