We're not going to find out how good (or over rated) Neymar actually is until he plays in one of the best leagues in the world.
He is dangerously overrated - but only by people saying he's on the same level as Messi and Ronaldo. He's very good (certainly better than Welbeck), it just makes me cringe whenever I see someone describe him as either **** or world class.
This is one of those rare times I'm going to agree with Olly. Neymar is not as good as he's portrayed and I think there's a good chance he never will be. He very rarely plays against top defenders and from what I've seen his attitude kind of sucks. My comparison with Welbeck was hyperbole and intended as humour, but what I'm trying to say is that he's overrated.