Convenient if you only need a place to sleep
and great location but be careful:
for those who know Paris this is a "chambre de bonne": not for anyone old or with a big suitcase as you have to climb 6 flights of stairs.
I don't need a lot but during the 2 days I was there wifi didn't work and the hot water turned itself off after any shower longer than 5minutes. Apt is relatively clean despite some dust in the corners but towels smelled of cigarette smoke. Not worth the price.