The good:
For its price and location, the apartment is hard to best. It is very lovely and spacious. It is bright with lots of windows, well decorated, and has a very nice kitchen. Location-wise, it is in a beautiful and lively area of the city and steps away from the RER-B, and bus, very close to several metro stops, and has great restaurants all over the immediate neighborhood.
The bad:
The only significant problem with the place itself was with the bed. It is actually comprised of two narrow mattresses on support frames that are just pushed together; this setup tended to shift nightly and open up a gap. But worse, the mattresses are quite hard and left me with a sore back for my stay.
The ugly:
The walls are quite thin and the upstairs neighbors enjoyed having shouting, stomping, door-slamming fights including very late night and very early morning on many, many occasions. Probably at least a dozen fights in a month.