Alex's place is well situated in Paris' Pigalle district, short walking distance from Blanche metro station. You have the Moulin Rouge on your doorstep along with the Sacre Coeur just a tube stop/ short walk away. The apartment itself was big enough for the 4 of us and we didn't feel like we were on top of each other. This place is good for a quick get away in Paris.
Alex was a v reactive host and answered messages generally within 20 mins :)
Negatives:
-Can be a bit noisy at times outside (bin men)
-Internet didn't work for me but it worked for my friend and her mum :S