This apartment was excellent.
The location was superb. It's on a street filled with cafes, bakeries and other food and drink places, but its inside a quiet courtyard so you don't hear the noise.
It's right near Voltaire station and also a short walk to Bastille station, so you have plenty of options to get around Paris (which will cost you €1.90 for a single journey, so long as you don't go through an exit).
The apartment was well equipped and a good size for the money by Parisian standards.
It's on the third floor, but the stairs are wide and not very steep.
Eric was very polite, provided thorough information and was very quick to respond to messages.
When I am next heading to Paris, I would definitely check to see if this apartment is available first.