We had a great stay at Renaud's flat. It is perfectly located, we managed to do a lot on foot and rue Montorgueil, which is 2 minutes away, is a very pretty street with everything you need from supermarket to café, restaurant, bakery...
We were 4 and the flat was perfect, it is of good size and the beds are very comfortable. Only downside was that the showers lack pressure. We had plenty of towels and check-in / check-out were very easy.
I would definitely consider staying at Renaud's place again.