We were promised upon booking that the aircondition worked well (we knew Paris can be HOT in the summer, so we wanted to make sure). However, the aircondition did not work at all and we were up for a couple of nights with little sleep.
Also, the street is quite noisy (and a bit shady, even for the area). There are some blinking neon lights in the windows of the hotel that also seemed a bit unnecessary.
That being said, our room was spacy and clean – and staff was helpful (even though there were little they could do about the aircon). We loved the close distance to Montmartre, but next time we’ll probably find somewhere else to sleep.