It's well-designed and an efficient discovery engine that turns simple search terms into opportunities to experiment with Google's expansive portfolio of products -- some of which you may have never seen before such as Google Moderator.
I Don't Love the Bugs
What Do You Love is a mash up of Google's services, including Maps, SketchUp, Patent Search, Photos, Books, Translation, and more. Some services, like Gmail and Google Voice, don't change much depending on your search term. When you search "fluffy kittens," for instance, Google Voice tells you to "call someone about fluffy kittens" and Gmail says "email someone about fluffy kittens." The way the Web works now, nobody needs yet another email or breathless VoIP call about fluffy kittens.
As of now, What Do You Love is little more than a polished instrument for Google's self-promotion, especially because WDYL doesn't handle "complex" searches as well as Google's main page does. But it's also cute as hell and might sponge up some of the time you'd ordinarily waste on Facebook today.