This apartment was perfect for our travel needs. Though it was small, all we really needed was a bed and a shower. The bed was actually really comfortable, too. But really, the best part of the apartment is the location. It's away from the touristy areas, near Le Marais (where you can find BEST falafel). The block it's on has several tasty restaurants, too. Just a few minutes walk to a metro station and a delicious patisserie.
One note is that it was a bit loud at times. There is no sound insulation between the apartments, so you can hear the people above you walking and doing laundry. There was also some construction going on which added extra noise, but honestly the jet lag helped us sleep through it (and a white noise app), so it wasn't really an issue, just something to note.
Highly recommend this apartment and would definitely stay again if we go to Paris again.