My girlfriend and I stayed in Reynaldo's place for four months. It was perfect. The apartment is exactly how it appears in the photos, really nicely decorated and also very practical. The bed is very comfortable and the walk in wardrobe makes storage easy. The apartment is a minute walk from Pigalle and Abbesses train stations, making it incredibly easy to get around Paris. The area is beautiful. It has 100's of restaurants and bars, a great bakery (Pain Pain) 50m from the door, a grocery store 1 minute away, is very lively and a 5 minute walk to Sacre Coeur. The apartment is on the fourth level and there is no lift but the building and area are both very safe.
Reynaldo is a fantastic host, he let us drop our bags 2 weeks early so we could travel light, and was always very accommodating and helpful when we needed him.
Overall was a very good experience and would highly recommend this apartment to anybody wanting to stay in Paris.