We have a lovely time in Paris. The location of the flat allowed us to walk everywhere. All main attractions were within a 30 minute walk, and it took us around 45 minutes to get to Montmatre.
There is a plethora of excellent bistro's within a few minutes walk, and even more if you're willing to walk up to 30 minutes. Obviously, public transport and taxi's are an option, we just like walking around exploring.
The apartment is comfortable, was very clean, and perfect for our 4 night stay with our two teenage boys.
The only downside, is that you can hear the metro rumble by, but that didn't really bother us. Just make sure you have plenty of the excellent, reasonably priced wine from the local restaurants and cafes.
We would stay here again without hesitation.