Jeremy's flat is great--the location is perfect, it's on the ground floor, and it's extremely clean -- not easy to find in Paris.
One major thing: There are no windows. This didn't bother me as it made it quite cool, even in hot weather, but if you have trouble waking up without natural light it's important to know.
Finally, I will say that it was VERY hot in Paris when I was there -- 94 degrees one day -- and the flat stayed cool.