Dani and Aigo are a nice and hospitable couple. The room is a bit spartan but very nice. The guests have also access to the kitchen and the washing machine, including spices, oil, dishwashing liquid and laundry detergent. That's really useful, since this is exactly the kind of stuff you usually don't want to buy for just 3 weeks/one month but you never find in bnbs.
The place is a bit far from the center, but easily reachable by bus; it takes 30-40 minutes to UNIL/EPFL. On the other hand, it's very close to the Art Brut collection and the Olympic Stadium and a bus directly connects it to the railway station.
Dani and Aigo are often out, so the house is usually very quiet. It can get a bit loud on weekends, but I wouldn't say it's unbearable and it's definitely good if you want to join one of their Saturday poker sessions (and Dani always asked if it was ok, and encouraged me to tell him if I had any complain).
If I had to find a flaw, perhaps I'd say that it would be good to have a small desk/table in the room.
In general, I'd recommend staying with them (especially if you like poker!)