What is the cohort there like both in the undergraduate and the graduate level?

You'll have to be more specific. It will be similar to the cohort in any other top national business school.

You'll have to be more specific. It will be similar to the cohort in any other top national business school.

The MSc ranking gives it a rather average score for mobility: http://rankings.ft.com/businessschoolrankings/nyenrode-business-universiteit/masters-in-management-2019#masters-in-management-2019 at the MBA level, the FT has not ranked it since 2008, so I don't think it's a great choice unless you speak Dutch and specifically target the Netherlands.

Yes, it's the preeminent private university in the Dutch speaking region is Europe, and has the sort of snobby reputation of, for example, EBS in Germany or Sacro Cuore in Italy.