"He is an excellent buy for Milan and he plays almost the same way as I do," Van Bommel told Milan Channel.
"De Jong is a bit like Rino Gattuso, in that he works both for the forwards and the defenders. He plays for the team.
"He was their best signing of the summer. I think he will quickly settle in to Serie A, as all Dutch players tend to do.
"He's talented tactically and, although his technique isn't perhaps exceptional, it is effective."