The flat is on the very top of a modern building, in a perfect location in central Oslo. It is small, but fine for two people and comfortably furnished. The view is fantastic (you have to try the roof terrace!), and the place was very clean. One note - the rooftoop terrace at the 19th floor is lovely, with patches of grass and flowers, chairs for relaxing and a perfect place to have a drink with a view.. but bumblebees thrive there as much as we do, so do not open the windows of the flat if you don't want them visiting, they are curious.
Air conditioning was a bit on the soft side, but Vegard told us to call in case and we never felt the need.
Great hospitality as well: Vegard was very flexible and immediately available when needed. The fire alarm went off in the afternoon (a false alarm) and we had to vacate the building for some 40 minutes til the firefighters came (which, due to the number and quality of cafe' bars around, wasn't a particularly painful thing).. due to this, Vegard refunded us a good chunck of the daily rate, even if nothing of this was his fault (or the building's). Top marks.
Definitely recommended!