Hi guys, we stayed at Tristan's place three nights and it simply was great. Tristan was a very good host. He helped us with transport (getting his apartment from the airport, going to Versailles, to the downtown, etc); he also gave us advice about which transport tickets to buy. The communication was fast.
About the place: It is located in Montmartre, so you can take a walk around this very beautiful area. Furthermore, it has very good connection for going to everywhere in Paris. For instance just in front of the entrance of the building you can take the bus 95 and can go to Louvre museum - it takes about 20 minutes. You can also find (as far as I remember) two metro stations about 8 minutes far by walking.
The beds were comfortable, the apartment had very good lighting. There is a lift, so don't worry about going upstairs after all day walking in Paris. The apartment was very clean as well.
We totally recommend Tristan's place to visit Paris.