My fiance and I stayed in Patrick's apartment for a week. The location is superb sitting between the bustling 5th and 6th districts. So many food options, right near the river, easy access to train stations and walking distance to the Notre Dame and the Louvre, and many other hotspots.
The apartment itself is very modern hut with a Paris charm. It has everything you need.
We were made to feel very welcome and Patrick had lots of recommendations about how to make the most of our stay.