Charles provided very clear check in instructions and communicated quickly during my stay. The apartment was very clean which made us feel at home. Having an entrance to the metro at the front door was also a plus.
A few minor suggestions would be 1) providing at least 2 keys as only having 1 key makes it challenging if people leave at different times and 2) adding a few more simple amenities such as hand soap in the bathroom and an iron/ironing board.