Its paid search, but it has the best results I’ve gotten from any search engine without any extra hassle. I pay for the 300 searches for $5/month.
The only complaints people have had about it is the cost, but I’m so happy with it I’ll happily jump to the next tier if I blow through these searches.
anecdotally, I find myself searching less and reviewing the results more. It’s less cluttered and the results, even 4 or 5 down, feel so much more valid/accurate/useful.