Lots of people have had nice things to say about the Xbox One. Microsoft would like to remind you of a few, because that's what advertisements do. It's mostly just the regular "this is the console that you need in your living room" stuff that you'd expect.
That is, until they threw in a quote from someone on Twitter that read "The Xbox One is the greatest thing that's ever happened to mankind." In my humble opinion, that may be a tad exaggerated. I'm ranking antibiotics and fire a spot or two higher.