The place is an apartment on top of a small restaurant, and it is full of old charm. The beds and mattresses are good, the bathroom is clean and comfortable. The only negative thing is that there's no door lock in the bathroom, so you have to create your own system of indicating it's in use.
Daniel is an excellent host. After the reservation was made he has sent a bunch of pictures/videos on all possible aspects of using the place.
The location could not be better, if you can tolerate some city noise: there some bars / restaurants around, with late visitors. The walk to Camden Town tube station is about 3 minutes, and with Oyster/Travelcard the whole London is yours.
We stayed for a week, and would come again.