We've just come back from an amazing trip to Paris and this apartment is in a beautiful location (very close to the Metro, in the heart of the trendy Marais district and close to Place des Vosges).
The check in process was great - we were met outside the apartment and shown around well.
The apartment had all we needed for our stay, although it was quite small for our family of 5. Our only very small issue was that although there are two bathrooms, the only one with a toilet is connected to a bedroom, so you have to go through a bedroom to use it.
Wifi worked well and enabled us to plan or book trips during our stay.
It is in a quiet courtyard which was great for sleep.