This apartment was just about perfect for our stay. We made reservations late so there were not a lot of options in our price range, but this was a good fit at a good price.
A couple notes:
The location is fantastic. The apartment is a short walk from anything you need, and next to a good grocery store. Walking out the door, you are right in the middle of a lively small street, with many shops. You are a few blocks from many big high-end stores, as well as cafes, specialty shops, metro, and other interesting stuff. It felt very safe there. It's a short walk to the river and the Tuileries. And if you walk 10 minutes east into the heart of Saint Germain, you find yourself in the middle of a bustling restaurant and bar district. Despite it's location, with a street view from the second floor, it was pretty quiet at night. I wake up easily from street noise, but this was not an issue.
We are experienced travelers, and we don't mind roughing it a little bit. (We actually like staying in places that have character at the expense of luxury.) The apartment certainly has a lot of character - it's an old Parisienne building, with worn stairway, tiny doors, exposed beams, etc. You really feel like you are living like a local.
The kitchen area is small, but well appointed. It was fine for making a small meal for two, and for lunch and snacks. The bathroom is modern as you see. We had to do some work from the apartment, and the table was okay for that, the bench was fine for a couple hours of email, but I would not want to work a whole day there. It's pretty tight. The whole apartment is very small for two people - there's no place to store your luggage, there is no closet, there were no hangers for clothing. There is a big dresser and a coat rack.
We were there for a week, and we would certainly consider staying there again for business or pleasure.