I tried this months ago, but couldn't really get into it. Actually, I didn't give it much of a chance.
Started using it again a few weeks ago, and now I really like it.
It basically does what no other app I've used does, and that is give you a real sense of a topic or market by pulling in all of these different types of data. This gives you a much better idea of what's going on than just doing a Google search or looking at some keyword data.