A lot to like about this place. It has a great central location, is near to a multitude of shops, cafes, bakeries, etc, close to a few of the major metro stops, is 30 seconds from the Pompidou Center.
The building is nice, off a slightly less busy street, secure clean building, and an elevator to take you to the 5th (6th) floor. Being on the fifth floor you hear little noise despite being in a noisy district with the Dr Feelgood rock bar downstairs. The windows have blackout shades so you can sleep soundly. We visited in September and temperature was perfect inside, no need for heat and only had to open windows for fresh air.
The apartment is nicely furnished, kitchen is well stocked, bed is comfortable, quirky decorations make it feel very homey. One bedroom is very small with a bed suited for a child or small adult. Washer, dryer, iron are handy. This is a great apartment for anyone with kids, it comes with pack n play crib/ cot, tons of toys, baby gates, baby tub for shower. Daniela can arrange for her nanny to babysit for you, we did this three nights for our 1.5 year old son so we could check out the museums open late and have some nice dinners.
Daniela lives next door and is a great communicator. Add her on WhatsApp and she'll answer questions in minutes, very handy if you have a quick question. She's very nice and helpful, left us coffee, juice, bread, milk and yogurt for our son and more I'm probably forgetting. She also had a wrapped gift for our son with a puzzle he really loves now.
Nothing really negative to say. The kitchen and bedrooms are upstairs so if you can't climb any stairs this might be an issue for you. This was a perfect stay for us.