I've been using Kagi for a couple weeks. I've so far found it to be excellent. One thing to note is it supports DDG-style bangs, and those don't count against your search quota, so getting used to using them for wiki, youtube, IMDB, etc., is worth it. I also bumped up to the $10 plan, just to wash out any second-guessing on searches, although the price even if you exceed your quota is pretty cheap, and it seems like most people probably do far fewer searches than I do.

I still find DDG to be pretty terrible, but I have very occasionally fallen back to google, mainly for specifically searches for businesses / services near me, that kind of thing, or for searches for very recent things - somebody had posted a screenshot of an article on IIRC Fortune Magazine's site. I wanted to read it, and it turned out the article was only a few hours old at that time. Google had it indexed, but Kagi didn't yet.

For more general searches and technical searches I do for work, though, it's been very very good, and those are the most important searches, to me.