My family and I recently stayed at Tristan's place for a few nights and really enjoyed our time. The location is great - very close to a Metro station and within walking distance (around 8 minutes) from Sacree Couer and Montmartre. As others have mentioned, be wary that you will have to walk several floors up to get to the flat - this can be tiresome especially after walking a full day around Paris! However, my family and I expected this, so we weren't too phased. Overall, I thoroughly enjoyed our stay and would be happy to stay here again in the future!