The trial limit was pretty annoying. I tried putting in several obvious and already recommended keywords and it said that they weren't found. Then I reached the trial limit. Sigh...
Instead I got terms like "backcountry gear".
The combination of only three test searches and a limited number of search results left me with the impression that it really just mapped general terms to related general terms which isn't particularly useful.
Perhaps focusing the ranking more on conversion would bias it more towards specific terms.