It was lovely staying at Jack's house! The place looks exactly like the pictures. Jack is very friendly and responsive. Place is cozy, kitchen had lots of spices to be used for cooking, all basic utensils etc , the house even has a desk and office chair, which I found super useful because I worked there for many days. (Just confirm with Jack first if you want a hairdryer).
Place is walking distance/ short bus ride from Greenwich park and Greenwich market and surroundings. Lots of amenities nearby, pharmacies, cafes, a Sainsbury 1 min away. Also worth noting the house was warm during some days of London snow, when it was absolutely freezing outside.
In general we enjoyed a lot staying at Jack's house and we recommend it!