The apartment is clean, comfortable, and ideally located. It is near a metro station making it convenient to get to most Paris attractions once you get familiar with the metro map. There's lots of great stores, pharmacies, and cafe's around.
The few drawbacks have to do with key pick up upon arrival. You have to go to an entirely different place about 5-7 minute walk away from the apartment (2 city blocks?) and drop off key at the same place. If you're exhausted from travel or coming in at weird time, this is inconvenient. We took the earliest flight out of Paris, so not fun to walk the key down the block at 5 am to just check out and then we had to prop open all the security doors to get back into the apartment to finish packing. Also the Wifi access was spotty at best. There were 3 of us that had to connect and it kept kicking us off. Otherwise, it was a great place to stay.