Aside from the great history of the area it is blessed with literally hundreds of easy to access ice climbs - of all grades, single and multi pitch. You can literally put your crampons on at the car and be climbing within 20 minutes. The 3 and a half hour journey from Oslo makes this a popular destination for climbers seeking ice and pretty much guaranteed good conditions.
The weather for our week was very kind, never too cold and blue skies every day - although you'll need to drive up the mountain to get some sunshine! All in a top week.