Just returned from a week in Paris, overall we were pleased with the apartment.
On the plus side:
-Location in La Marais was amazing, nice and quiet street, but only a 2 minute walk from restaurants/cafes/bars, and about 5 minute walk to Metro stations. Would definitely stay in this area again.
-Communication with Johanna was excellent, she was very responsive.
-Bathroom was roomy with excellent water pressure and temperature.
Not so much negative points, but ones to be aware of:
-Size of place was definitely "cozy" for a family of 4. That being said I think this is the reality for most places in Paris unless you're willing to spend a small fortune
-Be aware that if you visit in summer as we did, the apartment has no ventilation and was quite warm at night (25-27 degrees even with window open and fans on). Owners were great in providing extra fans for us but would recommend they install ceiling fans in each bedroom to make sleeping more comfortable.
Overall we were happy with the place and would recommend it to others. Thanks Johanna!