My family of five stayed at Valerie's place for 10 days during our Paris vacation. The location is wonderful. It is within a few blocks of several metro and bus lines, so we were able to travel to see various sights then quickly come back to the apartment for lunch and then head back out again. Also nearby are several grocery stores, so we could stock Valerie's fridge and make most of our meals at home (which saved us money!). The place itself is very cozy and comfortable. The shower and toilet are separate, which is convenient when you have five people. The place would comfortably sleep 6, with two upstairs, two on the pullout sofa, and two in the downstairs bedroom. There is a washer/dryer combined in the apartment, which we couldn't quite figure out how to use. We were able to wash our clothes just fine, but could never figure out how to get them dry using the machine. Valerie had a clothes rack that hangs over the bathroom door so we air-dryed our clothes and that worked out fine.
The apartment itself is on the 6th floor (no elevator!) so consider this if you have trouble with stairs. It's located above a bar and at night it gets a little rowdy. I slept with earplugs and was able to sleep okay, but the noise is noticable, especially in the summer when the windows are left open.