Fantastic location in a trendy area very close to the metro and a short walk from Notre Dame.
The apartment was beautiful and felt very Parisienne. Very high quality furnishings and facilities (Krupps coffee machine, Calvin Klein towels etc).
We were made to feel very welcome by Thomas and his colleague Hugo, with water and crackers left for us on arrival. That was a nice touch as we were hot and tired when we arrived.
Tonnes of bars and restaurants nearby. We liked the Japanese place immediately next door, while the pastries at Le Pain Quotidien across the road were perfect to munch on while starting our wandering around Paris.
There's also a taxi stand just 2 mins walk down the hill as you turn right out of the apartment. Handy for airport runs etc.
One quick tip if you're catching a later flight home: Check with Thomas if anyone is booked into the apartment immediately after you. He may be able to hold your luggage for you. In our case, this wasn't possible, but he kindly pointed out that Gare du Nord and Lyon both have left luggage facilities. The ones at Nord worked perfectly for us and allowed us another day exploring before heading to the airport.