The Netherlands played a lot better (second half) than in the other matches, so I really hope this will be continued. Don't see much problems against Costa Rica, they had a huge advantage against Italy which was the heat. And it suprised me they didn't beat Greece in the normal time, for me Greece was one of the weakest teams in this WC.
The quarter finals are looking good. Brazil - Columbia, Germany - France and Argentina - Belgium could be great matches. Normaly these times will go trough

And with all respect to Costa Rica, great peformances until now, no doubt about that. But it's not a team you want to see in the semi finals, I want to see the best teams in the WC.
Last thing. Robben indeed is a diver, but it was a penalty and so was the one at the end of the first half. But imo Mexico also deserved a penalty with Herrera in the first half.