If you're a light sleeper, this may not be the apartment for you - there is a bar immediately below (Le Prince) often with noise and music until it shuts at 3am.
Other than that, the apartment is extremely stylish, very clean, spacious and well located for both the city centre and Gare Midi. Picking up and dropping off the keys at a local 24h hotel, where you can also leave your bags, is very handy.
Catherine was also very quick to respond and very helpful throughout our stay.