Welcome Frank, as a Dutchman I am very excited about this. Not so much because I expect immediate succes. I actually think it is quite a big risk they took by choosing a completely inexperienced coach like De Boer. However, if he manages to adapt to Italian football and implements his vision with succes, I think we have a coach who can truly build something for the upcoming years. He likes to play possession football, knows how to implement youth players very well (and also has the balls to actually play them) and has a realistic view on things (he keeps his calm, doesn't go all crazy and knows when he fucked up). Also I think he is an excellent motivator, though some players may not like his Dutch direct approach.
He will need his time though, but I am already looking forward to the start of the season.