Positives: This apartment was generally spacious considering its a big city. We were running late for check in because our flight was delayed but the communication with the check in concierge was smooth and efficient. He was waiting for us when we got there. Once he left, we realized we needed an extra key, toilet paper (which was not initially provided) and hair dryer (which was mentioned in the description of apartment but was missing). All this was delivered fairly quickly upon request. The location for the place is great. A very short walk from restaurants and patisseries and the metro connecting you to the rest of Paris.
Negatives: I would not recommend this place for a long stay for a family. There were 4 of us (2 adults and 2 kids) staying here for a week. This apartment tends to collect a lot of dust for some reason, despite having the windows and door constantly shut and me trying to clean the floors constantly. There were no replacement towels and bath mats. Only 2 small rolls of toilet paper were given (that too after we called and asked for them). We went out and bought more. I wish there were a couple of hooks etc in the bathroom or bedroom to hang things. Its on the bottom floor so street noise (which is not too loud) could be an issue. But i was carrying a noise machine for the kids so we were not disturbed at all
Overall: Good apartment, especially for 2 adults. Great location. Generally clean (just dust issues). Safe building. Owner and concierge very responsive with queries.