I'm on Jerboa for the moment, it gets the job done, was more intuitive for me than Liftoff. With that said I will 100% be switching to Boost when it's available.
Just tried Jerboa again. The search is not good. It doesn't have the ability to search by comment, post, or user... Only search for communities.
Liftoff, Memmy, and Voyager all have this function.