The apartment is in a good location - very close to the Sacre Couer and a metro station. The apartment looks great in the pictures; however, it was very dirty, particularly the bathroom. I did report this several times during our stay however, nothing was done. Also, we literally had to move large bags of rubbish from the front door of the apartment building each time we came and went.
I have outlined these problems to the company since our return, but they said that the owner of the property was unwilling to compensate me in any way. Checkmyguest did offer a (very small) partial refund.