We enjoyed our week in Paris at Arié's place. The location is great, Montmartre is in 5-10 minutes walking, the subway station 1 minute, from where you can take a metro and be at Cite in 20 minutes. The apartment is very well equipped and has everything you need, as well as a special personal touch.
The apartment is situated on the first floor (called second in some countries). No problem for us, but have it in mind if you are traveling with elderly or disabled people.
Overall great experience.