Lots of treacherous corners, especially the corner 13 'Sachsenkurve'! Nice elevation change there, you get lot's of speed going downhill before, and have keep the momentum for the uphill section afterwards, but not too much... :)
The corners 5,6,7 and 10,11 are nicely set up, you have to find a line connecting them to be fast.
Overall a great track, not too hard to learn, but enough finesses to keep it challenging in different cars.