My Kagi career is quite steep - discovered it only recently, but went unlimited already. 🙂 What I love particularly is the configurable "more" button: even if you're still hooked to certain aspects of your previous search engine (like Google Maps), it's really all at your finger tips - if you prefer a different provider for a certain type of search, there's no search engine envy or temptation to go back, you simply integrate it into your Kagi experience and that's it.
Speaking of the "previous search engine": What I do miss is image captions when doing an image search. I understand that this info is available on Kagi as well, but one half you get on mouseover, and for the other half you actually need to click on the image. I prefer to see the info right away, makes my searches much more efficient. Maybe you guys can eventually make this configurable?