I am quite happy with my Kagi search results. The biggest weakness I have noticed in my few months using it is that it is a terrible experience for shopping. I believe this is due to similar factors that make it feel like a less spammy ad-ridden experience overall. It works well enough for product research, but comparing across product vendor's product pages tends to suck. I have to use a specific lens to shop for Raspberry Pi or Microcontrollers for example.