Ross Brawn knows driver feedback. One suspects that of all Michael Schumacher's strengths, a good working relationship with his engineers was within shouting distance of the top of the list.
Read Brawn's words about his first test with Hamilton, after Hamilton said the car had less downforce than last year's McLaren. Think Brawn's ready to retire again?
"I think we have made it very clear to Lewis that he is part of the solution. You have a choice in a team, are you the problem or are you the solution?
"He is part of the solution to get us where we want to be. He knows that and he understands that and I think he is relishing that.
"It is correct that he gives his reference points and helps us understand what we have to focus on. Some of it we knew already and that is why we restructured the aero group. I welcome that approach. It needs to positive and constructive but criticism of the right sort is helpful to a team, it drives you forward.
"He is very straightforward. In many ways he is very simple and straightforward. He tells us what he thinks and he is never short of detail in telling you what he thinks and, of course, you learn what level of detail you need to go to.
"He is interested in everything about the car. He is interested in the fact the stickers might not be put properly on the bodywork. He has got a very good eye for detail. I think he is going to be a very involved member of the team, which is what we wanted.
"He is clearly a very talented driver but Formula One is about so much more. There are a lot of highly talented drivers who don't have the rest of it, but I think he has got the rest of it as well."