The place is nice and quaint- I thought it was perfect for my girlfriend and I because we spent most of our time out and about, and it was close to Montmartre- my favorite area in Paris. Less than 5 min from the gate du nord and a 45 minute walk to where most of the sights are.
Note- the apt is attached (?) to a music school, so lots of kids running around and you share a courtyard window with many of them. This didn't bother us, but it did get loud at times at night.