The first half of the route has lots of really nice straights.
And the second half has lots of nice corners. Schitzofrenic almost ;-)
The route ties together E16 and E4, and thus provides a corridor for those that come from the South of Norway, are heading North, and want to avoid Oslo traffic.
Along the route you can visit the Museum / Art Gallery Kistefos, which is well worth the time. They have a good collection of contemporary art. You can also visit the Hadeland Glassworks , where you can learn all about making glass and purchase at factory-outlet prices.