It was a delight to stay at Marie's. It is lovely, modern and cute Parisian flat - it's like staying in a hotel. You can walk to at least metro stations and to Montmartre, so, although the location is slightly away from the Paris buzz, it is incredibly easy to get lots of good restaurants and bars near by. There's a great breakfast for 7euros at the bar nearly opposite the flat. We recommend going to the bakery on rue championnnet nearest to Guy Moquet metro stop.
We had a very comfortable stay. Marie was in contact regularly to make sure that all was as we expected. Great host, great apartment, we'll definitely stay again.