Public opinion on recent Netherlands marijuana ban?

I've been reading about the recently-enacted ban on drug tourism in the Netherlands (a new law is making it illegal to purchase marijuana without Dutch citizenship), and want to know a little more about it from someone living there. What is the social situation surrounding the ban, especially in major cities such as Amsterdam and Rotterdam? Do you think that most coffeeshop owners will furtively ignore the ban or rigorously enforce it? And do you think that the ban will go unchallenged in forthcoming sessions of parliament?