This is great place to stay! It's not large so if you're traveling with a family of 4-5 and planning to spend a lot of time in the apartment this isn't the place. However, if you need a great base to go explore the city, this is a great one. It's reasonably priced and about a 10 minute walk from Montmartre, the Anvers Metro station (can go anywhere in the city on the Metro) Gare du Nord Station (from that train station, you can get anywhere in Europe and take a train direct to London). The vibe in the area is pure Paris. There is no shortage of places to eat and have some fun.
I was surprised at how quiet the place is at night. I wouldn't been upset if there was some noise (my choice to stay in the city, right?), but there wasn't. For fellow Americans, the bedroom even has A/C :)
One nice bonus was a mobile hotspot provided by the host. That's a huge deal because for those visiting from the US, your data plan usually allows for .5 GB of high speed data per day until it slows to a crawl (and that is honestly NOT a lot - especially if you use your GPS to get around). It's a nice extra touch and very much appreciated!
I would stay there again next time I'm in Paris. Again, it's NOT a huge place so be advised, but we just wanted a base to go explore the city so it fit our needs perfectly. I can sit in an apartment all day without having to travel across the Atlantic :)