The former Feyenoord midfielder completed his move today.
"In the Netherlands we play very often on Sundays, so I could on Saturdays watch English football. I think this is the best league in the world, it is a challenge for me to show people what I have in my locker.
"In conversations with this club I felt very confident. Last season at Feyenoord was beautiful, but sometimes you must make choices in life," he told the Villa website.