We stayed here for a whole month. The one-bed flat is in a very nice and quiet location right next to one of the docks of Surrey Quays. The environment feels safe and secure to walk around at night, and the building this flat is in is walled off from and with an entrance to the nearby road. The location is served by bus and one can easily get to the Canada Water tube station via bus or a 15 mins walk - which we preferred since that takes us along the Docks. Nearer than the tube station is the Canada Water shopping center, where you can find the Tesco extra, Poundland, Boots etc.
There is also a few nice restaurants within walking distance - the Pear Tree in the Greenland Place development, Cafe Mama Pho which is a bit further, on Lower Road, and Cafe East were especially nice, all of which are within walkable distance from Marianna's apartment.
The flat itself is very homely and comfortable, and the washer-dryer was a very pleasant surprise! The shower is strong and even hot if you so wish, and the generously-sized living room allowed us to have all our suitcases open with room to spare. A slight difference with the photos in the listing is that there is actually a TV on a small stand in the corner of the living room!
As a host, Marianna is responsive and very accommodating. She allowed us to transport some of our luggage to store at the apartment ahead of our check-in after learning of our timing issue with a previous accommodation, and she immediately replaced the kettle with a new one when the existing one stopped working.
Needless to say, we recommend staying at Marianna's flat!