I had a very nice stay in Geneva thanks to Philippe & Alexandra! Their place is perfectly located and you can walk to every place you need to go in Geneva (3 minutes from the train station, 10 minutes from the old town, 15 minutes to the conference centre).
The room is small but very nicely arranged. Also, you can use the kitchen (you'll have space in the fridge etc). Since I love to sleep with open windows I used earplugs because I found the street not too quiet (not too loud either ;-) -- just a recommended thing to bring.

All in all: Perfect hosts, perfect stay! Very recommendable!