Wow. This appartment has probably the best possible location in Paris. Less than 1 min to Notre Dame and central Metro stations. The appartment is wonderful, newly renovated, the quality of the interior ( and the windows ;--) is premium, little details are perfect, hosts are just as you would like it. This is a GO!
Actually, after maybe 10-12 times in Paris I would also say this is the "Best Buy" I have had so far. Thanks Matthieu and Vincent for making the difference for our 4 days in Paris, our stay was unforgettable.