Marc was fantastic in helping us navigate to his place and find parking (he has an underground spot, suitable for smaller cars).
We happened to arrive when there were some serious traffic issues, and Marc met us to guide us in safely.
We got in late, and fortunately there was some amazing Bangladesh food nearby. Best food we had in Paris!
Marc was very welcoming. His place is as advertised, and very accessible with the subway.
We had no issues with co-ordination, but as Marc works far from his place, make sure you arrange your meetup in advance. Also there are a few flights of stairs to get his place, which shouldn't be a problem for most people