The location is perfect and central - everything is within reach. It is ideal for when you want to see a lot of places in Paris, since there are many metro stations nearby.
At first glance the appartement seemed very clean and tidy, however after spending the night we ran into a few problems. There was no toilet paper and the water in the shower had problems with draining. Luckily after communication with the host, which was always optimal, we could fix it together. Also after giving it a good clean ourselves (they do ofter a good selection of cleaning products), we were happy with the cleanness of the place.
The appartement itself is a nice size, a downside is that the window is located next to the garbage collection site. There was furthermore no other opportunity to allow fresh air to come in, so we often had the front door opened.
The appartement is on the ground floor next to the entrance of the building and often people walk by, so using earplugs to sleep at night is definitely a must.
Otherwise the street is beautiful, the people are wonderful, there are incredible restaurants nearby and the host is very hostile!