I lived in Simo's house for 3 nights with my parents. The house is as it looks in the photos. It is very centrally located, walking distance (4 mins) from the metro station. The neighbourhood is very lively, full of restro-bars, which might mean that it can be slightly noisy at night. However this did not cause any problem for us and we enjoyed the overall stay.
The house is clean, has all the amenities required. Simo is very accessible and made sure that our stay was very comfortable. Unfortunately we could not meet him as he was away, but Clement took care of our check in and check out. He was very friendly and helpful and was very willing to help. I would definitely recommend this apartment to anyone looking to live in central Paris.