We loved staying at Mary's place and will definitely recommend it to anyone.
The communications before arrival was great and easy. Mary is super friendly and helpful with recommendations for the area.
The location of the apartment is in a great part of London with loads of bars, restaurants and shops to discover. Additionally the apartment lies just off Old Street Station (on artrival we had around 55min from Gatwick and on departure around 40min to City Airport).
You'll have a whole floor with ensuite bathroom to yourself. It is very stylish and has everything you need. Just look at the pictures. This is what you get.
So if I'll be in that area of London again and Mary's apartment is free I would look no further.