PROS:
Location - As other reviewers have said the location is very central and convenient. 2 blocks to the subway. 2 blocks to a small grocery store. There is a bakery right down stairs which was nice for getting baguettes and croissants.
Clean - You could tell the floors had not been mopped because your socks got dirty but otherwise it was very clean.
Spacious for Paris standards - We fit 9 people (6 adults and 3 children) very comfortably.
Each bedroom and the studio had its own shower and sink. This was really convenient since there was no waiting for other people to get out of the shower. we also never ran out of hot water. There are also 2 toilets in the main apartment and one in the studio.
Each bedroom had it's own heater so you could control the temperature individually.
Great host - Check in and check out was very easy. Eloise responded promptly to any questions we had both before and during our stay.
There is a washer and dryer.
CONS:
Noisy - the three bedrooms in the main apartment all face a busy street. Not only do you get the car noise but there is a busy sidewalk with shops right bellow the windows so you can hear people talking. Luckily the shops do not open very early or stay open too late. All 3 bedrooms in the main apartment are also directly adjacent to the living area. So if anyone was up and about while you were trying to sleep you could hear them easily. I would definitely recommend bringing ear plugs if you stay here. I was able to sleep fine with ear plugs in.
No view or privacy - as I said the bedroom windows face a busy street and are just above a busy sidewalk. We ended up keeping the curtains drawn the whole time otherwise everyone would be looking right into your room.
Mosquitoes - We couldn't figure out where they were coming from since it was winter and we kept the windows closed but we all saw and were bitten several times by mosquitoes inside the apartment.
Lacking charm - the apartment is furnished in a very simplistic way with modern furniture that was grey, black and white. It wasn't very cosy and didn't have any charm.
This is minor but there were not enough pillows. I think everyone had one pillow but several of us would have liked to have two.
Bottom line - it was okay but I would not stay here again.