" Some professionals say you need to have a praise-to-criticism ratio of 3:1, 5:1, or even 7:1. Others advocate the “feedback sandwich”—opening and closing with praise, sticking some criticism in between. I think venture capitalist Ben Horowitz got it right when he called this approach the “shit sandwich.” Horowitz suggests that such a technique might work with less-experienced people, but I’ve found the average child sees through it just as clearly as an executive does. "
― Kim Malone Scott , Radical Candor: Be a Kickass Boss Without Losing Your Humanity