There's not much that beats an endorsement from Oprah Winfrey except perhaps when the talk show maven uses a rival's product to do the endorsing.
That's exactly what happened to Microsoft last Sunday night when the former daytime show host was on Twitter listing some of her favorite items for the holidays using the hashtag #FavoriteThings.
In the midst of all her endorsements, Winfrey sent out a shout out for the Surface, saying she's already bought a dozen as presents this year.
"Gotta say love that SURFACE! Have bought 12 already for Christmas gifts. #FavoriteThings," she tweeted around 9 p.m. Sunday.
Twelve tablets? That's high praise coming from anyone, let alone one of the most influential people on the planet.
Unfortunately for Microsoft, though, when you see Winfrey's tweet using a third-party Twitter client, such as Echofon, you can see where she sent it from -- and it wasn't the Surface.