When I first switched, I would often click the button to run the search on google for queries that weren't immediately giving me what I wanted (rather than go through the next few pages of results), but invariably I wouldn't find it there either. I think that's what gave me confidence that Kagi's results were at least as trustworthy as anything else. (to compare, I did the same thing in my multiple abortive attempts to switch to DDG and it always came up wanting).