The apartment itself is quite quirky, but neat enough, with thoughtful touches added by the host. (Sweets, directions etc)
Tiffen wasn't home so I had it to myself. If you, like me, literally just want a place to crash while you explore central Paris, then you'll find that it's a little further out of the way than you would like (on the outskirts of Paris). The result is that you typically have to take at least 2 different metro trains to any of the main attractions - and Paris metro trains leave a lot to be desired.
Otherwise no complaints. For the price you won't get much better. It's very well-priced. Still would only recommend to people under the age of 35-40 with an open mind who aren't bothered by the extra travel time into the city.
Sad I didn't meet Tiffen. Seems like a cool person!