The flat itself was very nice - compact, with good amenities and very near to Blanche and Place de Clichy Metro stops. The double bed and sofa beds were extremely comfortable and the flat was clean and well maintained. The main downside for us was the use of a QR system to enter the apartment complex and flat itself - we and several other guests struggled with this, in one case waiting over 25 minutes to get into our flat and having to shout up to another guest to let us in. The other thing to be aware is that the apartment is not really in Montmartre as the name suggests, but instead in Pigalle. It is just round the corner from the Moulin Rouge and is located in the Parisian equivalent of Soho (so there are a high number of sex shops and lap dancing clubs in the neighbourhood). As we had young children with us, this was a bit of an eye opener for them and led to lots of questions!