We stayed at Charlie's apartment in mid-June during a huge heatwave, though we did not find any A/C to cool us down it was not a massive problem for us, just a little uncomfortable at night. The apartment is well equipped, though we were a little disappointed to find that it looks a bit different to pictures in that there is more clutter - obviously this being their home cannot exactly be helped, but we were surprised that the host's washing was still in the machine and washing up had been left next to the sink (we only arrived at around 6/7pm so I do not think this was due to being in a rush to turn it around). The location is great, there are many nearby metro stations and it is a nice area for some restaurants though generally we ate out in other parts of Paris. I cannot fault our host for his communication, he was lovely and offered his help and advice on multiple occasions. Generally this was a good place to stay, though cleanliness could be improved.