We (my husband and I) stayed in Paris for 4 days and can recommend a stay in the appartment. It is very clean, provides for all neccessities and the location is great (in walking distance to Sacré Coeure and different Metro lines close by).
Very good communication: when our train was delayded the team from Guest Ready found a solution how we get the key although the keynest point for picking up the key was already closed.
We had a good time. The term "Charming" hints that it is not a modern flat but we liked it.