I am very satisfied with my stay at Hong's place. Hong sent detailed directions with photos for check-in; since she left the keys for me, I had a lot of flexibility as to my arrival time. The apartment is cosy and comfortable for one person. Just be aware that you will have to climb six flights of stairs as there is no elevator (pretty typical for studios in Paris!). The metro is a quick walk away and you can get almost everywhere in the city within a short ride. I appreciated little touches like the tea and fruit Hong left for me.