How is he the best player and not Neymar/Messi? Not being biased here.
As I said, the single most dangerous/feared player in the tournament, in my opinion. You may have other criteria. If I'm drafting a team to play in the World Cup right now, I'd pick Robben first, Messi second, and plenty of other players before Neymar. Not to say Neymar isn't doing well with Brazil, but solid defenders/tactics won't have much problem with him (just as Netherlands shut down Sanchez). Robben and Messi can score, no matter what you do to stop them.