I viewed the instructional set-up videos first, then installed it as per their on-screen directions.
Installation took only a couple of minutes - literally.
The longest part - again a minute or so - was waiting for all 1200 posts and pages to be indexed.
I tested the searching, and it works fast and well. Analytics are available immediately online.
I've also made a desktop short-cut to the Swiftype Analytics page to check the site search results directly.