Are you two-dimensional? If you are, then you'll have no problem staying at this apart-hotel. If you're sporting a z-axis, however, prepare to feel very cramped here. There is very little room to move around, the shower is unbelievably small, and chances are you'll find yourself tripping over things all the time. To make matters worse, hot water only lasts for about 10 min, and takes hours to recharge, so good luck showering if more than one person is staying in the room.
On the plus side, the bed is fairly large (for a Parisian hotel), the room was clean, the staff is friendly enough, and the train station is right around the corner (though it takes a while to get to the center of Paris).
If you're just looking for a cheap-ish place to crash, and you're rather petit, then there are worse places to stay. I, for one, will never stay here again, though.