Hey Fante,
I'm the academic program director for that program (feel free to verify, you can reach me here). Nice to hear you got accepted!
You're right, few people know that the UN has its own university, even though we were established in 1972 through UN GA Resolution (A/RES/2951 (XXVII). The reason is this: UNU was initially meant to be a think-tank, not a teaching university. We only started moving in this direction in 2010, after a December 2009 amendment to our charter by the UN General Assembly (A/RES/64/225).
The program you are going for is actually older than this: it's roots go to 2000, when the ILO was looking for a partner to train people in Social Protection particularly. This lead to the foundation of the Maastricht Graduate School of Governance in 2004 and the launch of this program in Feb. 2006. We merged with our local UNU branch in 2010 and are now offering courses equally between Maastricht University and several UNU institutes including CRIS (Brugges, Belgium), MERIT (Maastricht, Netherlands) and EHS (Bonn, Germany). We have guest instructors from all over the world, including the Maxwell School at Syracuse, the Oxford Migration Institute, the ILO, …, covering IOs, national and sub-national public bodies, NGOs, consultancies, etc. We are members of APPAM and NASPAA, are fully accredited in the Netherlands and are about to pursue NASPAA accreditation as well. At the moment, our program is ranked #1 in the area of political science and public administration in the Netherlands based on student and alumni survey and expert assessment.
In comparison to US schools, we are young and — thanks to our pending FAFSA listing — not well known in the US. But we regularly have US American students, and students from many other places: here's a map I map I made of our incoming applications last summer.
I don't know where you are geographically, but in case you are coming to Europe in the spring, drop by and be a student for a day. We'll get you into some classes so you can meet our current students and see how things work (not just the glossy brochure view of things).
Meanwhile, feel free to ask me things here!
Cheers,
Lutz
PS: I am presently traveling, so I might be a little slow in replying.