Fred was a great host, before our arrival he sent us some useful information on the flat and the area, then he met us at the flat and helped us finding the address, which was nice since we got lost (err never trust a free GPS!). Communication was always quick and easy and he was very kind to check how we were doing later. I appreciated a lot his flexibility, our flight was late in the afternoon and he had another guest coming but he quickly let us know that the next guest was late, so that we could stay a little bit longer.
The flat is big enough to be a studio, very new and clean, the kitchen has everything you might need to cook at home :)
The area is not the most amazing unfortunately, it looks a bit deserted and you can meet some pretty weird people, at least for european standards. Anyway it's only 10 minutes by walk to the Bart and few blocks away there are some restaurants and bars.