What a lovely stay we had! Even though our train was delayed and we ended up arriving very late, Nicolas's wife very kindly waited up for us to let us in and show us around. The studio is very comfortable and clearly recently remodelled - the heating, shower etc are all brand new and worked very well. They also very kindly held our bags after check out so that we could go and have a day out before catching our evening train home. Can't fault them!
The location is very convenient. Marais is just around the corner and so is Pompidou. It felt pretty safe to us.
Many thanks again for everything!