I spent a week with my husband and 2 kids (ages 11 and 13) in Pm's apartment and would recommend it.
The apartment was clean, with a pleasant modern interior, and provides ample room for 4 guests.
The location is convenient: only ~30-min walk from many London attractions, and with a close tube stop.
Some nice "above & beyond" features were the Washer/Dryer, elevator, gated complex and lots of toilet paper : )
We did have an issue with some water leakage in the bathroom - hopefully this will be fixed in time for the next guest.
I also made some suggestions to the owner to improve the lighting in the bedrooms and the bathrooms, add some items in the kitchen (cereal bowls, large frying pan, basic spices, paper towels) and in the bathroom (shampoo and conditioner).
Overall a good place and a good value.