This has been driving me mad for the better part of a year: the autocomplete behavior in Safari is totally broken. Last year it started picking words from your query and going through your history and using that to autocomplete so you'd always go to some random thing from your history that's barely relevant even for the most generic search terms (if I type "ptrace" I want to go to a web search, not some random Stack…
I remember when I believed it. Then I actually got an iPhone and it killed that idea.
Cool box and fun signup, but it never felt quite intuitive.