Oh, man... where to begin. This rental was incredible. I stayed for a full month, and the rental quickly became like a second home for me. First of all, you're in a prime location. Once you walk out the door, you have Gare de l'Est and Gare du Nord directly to your right and Notre-Dame and central Paris to the left, all very easily within walking distance.
The apartment itself is up only one flight of stairs, so not at all cumbersome to get to if you have a large suitcase.
It's got a fully equipped kitchen and it was also such a nice bonus to have a washing machine in the apartment.
The only real downsides I can think of are that it can be a little noisy when someone walks up/down the stairs outside the rental, and there's not a ton of privacy out the window. You're pretty much looking right into another building and vice versa, so I generally kept the curtains drawn. Also, when I first arrived, I did a quick scrub of the cooking utensils since there was a layer of dust on them. I came to realize that this dust collects rather quickly, though, since the utensils were coated again within a couple of weeks (due to a lack of use on my part).
For any remote workers, the wifi is strong and fast, so it's ideal for taking a trip to Paris while staying plugged into the office.
The host, Sabri, was also very responsive and helpful throughout my trip. On the whole, you absolutely can't beat the value of this rental for the price (it was ~$1,300 for the month).
Be sure to pay a visit to Holybelly 5 right around the corner. It offers one of the best breakfasts in the city. If you're served by Big John, tell him Kate from Columbus says "Hi." :)