I booked early for this little gem. Just near the Champs' E it's in a great location for the metro but we walked everywhere really. There are many restaurants nearby, and the Eiffel Tower is in walking distance to see it lit up at night across the river.
There were 5 of us adults and one small 8 year old. Sleeps 6 comfortably. And the apartment is homely. I'd go back and stay there again.
Just so you know - didn't bother us - but the toilet, which is separate to the bathroom is tiny.