Tottenham fullback Adam Smith feels all three promoted teams will make their mark in the Premier League.
Smith faced Cardiff and Hull in his 25 appearances on loan at Millwall in the Championship last season.
"Cardiff have a great team spirit, impressive wingers and the right mix of youth and experience,” Smith told the Spurs website.
“You can then throw in a player of the quality of someone like Craig Bellamy and you can see why they did so well. They deserved to win the title.
“Hull didn’t really have a goalscorer but they played good football. It was quite similar to how Wigan play. In fact, Hull and Watford both passed it well last season.
“Palace had Zaha and Bolasie on the wings, tricky players. Everyone knows about Zaha and now he’s at United. Millwall drew 0-0 at Palace right at the end of the season and they did well to win through the play-offs.