I agree with Mr. Horse -- No, sir, I don't like it.
When I looked for topics I knew were on the websites I chose, sometimes it couldn't find them, and sometimes it gave me dozens of useless links first. There seems to be no way of telling it to search the websites in a certain order, so that one could search small, esoteric, narrowly-focused sites first, and then if there was no match have a broader backup, like, say Wikipedia.
And the interface is not only spare (and therefore boring), but it also reminds one of a certain discount chain.