I booked Habib's flat the day before arriving! He was very prompt at communicating which made the last minute booking easy to organise. Although we didn't actually meet Habib, he left clear instructions for keys, wifi, etc. and even offered to look after our bags incase we couldn't leave our bags in the flat on the last day before our return train. The flat itself is tidy and functional - fine for a short stay. It's well connected - took us 10 minutes to get there from Gare du Nord and most places we wanted to visit in Paris was a max 20 min walk away (Marais, Odeon, etc.). However, it's actually located in a little passage between Boulevard Sebastopol and Rue Saint-Denis (closer to Strasbourg - St Denis metro) and near a few sex-shops; so just be aware that over the weekend (during the day but particularly at night) there were several working girls hanging around on the streets.