Fantastic location, spacious and clean with a number of nice amenities. After a few days the climb up the stairs was no longer daunting - and in fact prepared us for skipping the funicular to Sacre Coeur in favor of taking the steps! (How do you say "buns o' steel" in French?)
Perhaps too close to shopping options for stylish womens clothes, but I'm sure our bank account will eventually recover. ;) The nearby laundromat was reasonably priced and easy to use. Lots of good restaurants within a 2 minute walk, as well as grocery stores and even Lavrut, an art supply shop.
For future renters, be aware that the shower stall is small and the floor of the bathroom will get wet every time you shower. Also note that, while the view out the bedroom window across rooftops is lovely and seemingly private, you have neighbors on all sides and they will (rightfully!) scold you if you wake them up when laughing at Aunt Edna's stories on the phone at midnight.
Excellent communication, prompt replies to questions, and overall an extremely positive experience. 10/10, would rent again.