I can recommend Goran's place very highly. It's beautiful and clean, very spacious and in an amazing location next to a giant park and a very cool Primrose Hill Village as well as the Belsize Park Village, equally cool.
There is tea and coffee and go on Britain's with a big smile at the door and told us lots of great details about the local area. When I had any questions he was extremely responsive.
I will definitely be staying here again whenever I visit London.