Such a cool space. We absolutely loved our stay here—it was so handy to be able to buy local food from the supermarkets and cook at home. We also used it as a retreat when it got dark, as we didn't like wandering the streets of Paris at night (we were two single females).
It's right at the foot of the Sacré Cœur, so we walked up there every morning for the view (though do be careful of the pickpockets up there—we inadvertently chatted to a couple of them for over an hour...). It's also in walking distance to gorgeous areas to explore, with great bakeries (towards Abbesses). If you want a cosy, authentic French dining experience, we highly recommend Le Bon Bock: the duck confit was to die for.
We stayed in winter, and the house needed a little bit of airing out when we first got there (bit musty). It got cold overnight (possibly because the heating is on timer), but there is a small heater in the bedroom if you're desperate (we just slept in thermals and were fine).
I would love to stay here again—especially in summer, and probably in a group of three next time :).
Thanks so much, Rocco!