For convenience if you're getting an early/late train from/to Gare du Lyon, Raph's place is an excellent location. Not the best vibe neighbourhood in Paris, the usual mix around a station, but you're very close to the metro to get elsewhere, else it's 20 mins walk to the Marais.
Unfortunately Raph had some issues with his phone which caused some problems with re-sending information pre check in but he was very helpful and communicative for the rest of the stay.
The room itself is very basic - a single room, a little rough around the edges as the fittings are showing their age. Sheets and towel was clean, but unfortunately some of the kitchenware was not. he did leave some complementary tea which was welcome. Most significant downside on my stay was the absence of air conditioning - there was a unit in the room but it was in parts and no vent to expel the air from the room except the window. No reason to not recommend, as location and communication is great, as long as you know what you're getting in to. It's Paris, you don't get much for your money!