van der Vaart rated all four competitions, saying that the Premiership was the one he feels is of the highest standard.
"Holland is the best league to learn football. Good league, not the strongest in Europe, so that's good. I left for Hamburg, which was good, then you can build up in Spain," he said.
"The speed of the game was so high here that it took me a while to get used to it but I am getting better now.