Decent, good-value place to stay right off the bustling bar-and-restaurant-filled street of Boulevard Saint-Martin, conveniently located a few minutes away from a major metro stop and near to several small grocery stores. Be warned though -- the apartment is on the top floor, which means lots of stairs, as well as oddly slanted ceilings (you have to duck to walk from the entry to the main room lest you hit your head, and the kitchen is nigh unusable if you're 5'10" or taller).
There are a few other quirks of this apartment which make it unsuitable for some -- the shower curtain is really low, so you have to be careful when showering lest you flood the bathroom floor; the toilet is all the way by the entryway, but the sink is back near the main room, so you have to traverse the slanted and low hallway every time; and the bed is elevated on a platform which means you have to ascend and descend a small ladder to get up -- but they're relatively minor.
Overall, I enjoyed my stay, and would recommend it, with a few reservations, to anyone looking for a low-cost option in a great area.