We spent the last week of June 2017 in the apartment. Overall, we had a very good visit.
Pros: The location is very convenient, and the metro is only a couple of blocks away. There are two markets and two Boulangeries close by. The apartment is on the 6th floor, but there is a small (4-person) lift available. (We generally used it going up, and used the stairs going down.) The apartment was well fitted out, with enough kitchenware and dishes. We didn't cook at all during our stay, but we could have. We appreciated the fridge/freezer, the washing machine, and the Nespresso machine. The WIFI worked fine, with decent speed and coverage throughout. (We never turned the TV on-- that's not why we were in Paris!)
There was a corkscrew and enough wine glasses for all! Finally, the terrace was a real plus, we spent time out there every evening. You can see the Eiffel Tower from the terrace!
Mixed: The RER train station is across the street, That is convenient when you want to get to the tourist areas. But it can be noisy at night-- especially when the weekend celebrants are going home after a late night out. (The street below is used by people going to the train station.) I suspect this is more of a "summer issue"-- it was fairly warm the week we were there, so we had to leave the widows open at night.
Cons: Privacy is a little lacking. There are no shutters or curtains on the big windows in the Living area, and the people across the street are looking right at you.