This is a real simple one: OUTSTANDING!
We stayed with Kare and Truls for one week, and it was absolutely fantastic. The rooms are very nice and cosy and from the balcony you have a perfect look over the Oslofjord with a (nearly guarenteed) spectacluar sunset every evening.
We didn't see Truls that mutch, but Kare was a perfect host. Always careing and more than willing to help with any need one may have. Be it sightseeing or Shopping tips or whatever. The breakfast also is a must have, at least once.
So if we come back to Oslo, we will definitely stay there again!