This is a guest house with a restaurant on the ground floor and apartments upstairs, one per floor, four (?) in total. The location is great: close to all the sightseeing points, there is a beautiful Opera building right across the street with a tram track, so the view from the window is good too. We stayed here during the Ghent festival, so it was quite loud at night (one of the stages was within 1 min walk), but the bedroom window opens to the backyard, so it was relatively quiet there (and Kristof provided free earplugs).
The apartment we stayed in (Otello) and the whole house are designed in a simple but interesting manner. One thing that I haven't seen so often before was a shower in the kitchen, but it fits there quite naturally. Everything was clean, and communication with the host was easy. The only thing one should keep in mind is the stairs: there are quite steep and narrow, and there is no elevator, so be ready to walk up and down for a bit.
To sum up, it's a really nice place to stay in Ghent, and Kristof is a very friendly host and chef.