I have only tried one search, but so far it's impressive. I have been using elicit.com, but they seem to be taking a different approach that is less AI-heavy. I would definitely give this a shot for a few months.
We're trying to bias the system toward more autonomous execution, rather than a "copilot"-like experience where you iterate back and forth with the system. That lets us run more useful subroutines in parallel in the backend, as long as you specified your complex goal clearly.