I stayed with Marc for a week, and he was nothing but a gracious and accommodating host during my stay. He is out most days working so you won't see him much (he has his own dedicated room where he sleeps) but he gives full access to both the kitchen and living room for your use during his stay. The WiFi / internet connection is very fast which was useful when syncing my photos for the day while I was sleeping. As he notes in the description his place is on the 4th floor and there is no lift so be prepared to go up several flights of stairs.
Marc was always responsive to my messages if anything came up, and the location is a block away from a Netto grocery store, bakery, apotek & Metro station for easy movement in Copenhagen.
If I have another chance to be in Copenhagen, I wouldn't hesitate to reserve another stay at Marc's place.