I have been experimenting with this week and while I like it, I am still not sure I like it enough to find it worth paying. It is still mostly using Google and Bing as a search provider, so I haven't so far found drastically different results than what I get from DuckDuckGo. Having a limit on searches also makes me a bit anxious when you are used to just searching for all kinds of stuff simply because I am lazy and don't want to type in full URLs or go to my bookmarks. Lots of muscle memory that needs to be revamped. I do see the potential in how it can be customized with personalized lenses and lowering/raising specific domains. And the people behind it seem really nice on Discord, so I expect to see a lot of innovation in search that we haven't seen from Google in years.

You have to pay a few bucks? How many and how often?

I switched to Kagi a few months ago, and I haven't had to use !g at all so far. Given that I had to daily on DDG, I'm pretty satisfied with the results!