I spend 3 months at Oscar's place. Oscar is a very nice guy, he was very helpful since the beginning of my stay (he even looked for a parking place for my car, while i was working, because i couldn't find one the day before) and he was always there for giving advices, no matter what it was. We had some great talks in the evening, but still he is a person who gives you a lot of space for your own, which was quite comfortable as well.
My room was quite small, but still i managed to put all my stuff in it, which was a lot!;) the rest of the Apartment is nice and cosy. there are two balconys to each side of the apartment and it was great to have your breakfast out there in the sun. The Apartment is very well located, close to all the Bars and Cafés in Carouge and near to the City as well.
Highly recommended!