I stayed at Jürgen's place for around 10 days while I was working in GVA as I preferred having my own space rather than staying in a hotel. Jürgen's place is in the middle of one of Geneva's most lively neighbourhoods and really well connected to other parts of town, including Carouge, which is 10m away. The apartment is more functional than cozy, and you'll be able to cook, do your laundry etc as it's pretty well equipped. While clean, I found that the photos in the add made the appartement look a bit better (no plants etc) and certain pieces of furniture have probably had better days.
That being said, for GVA standards it's really good value for money and Jürgen provides clear instructions and answers your queries rapidly.
If you're looking for simple accomodation at reasonable prices ar one of GVA's most interesting neighbourhoods, this is your place.