My GF and I stayed in the room for 5 nights.
Our stay in Greenwich was great. What you see is what you get: a nice attic room in a beautiful house in Greenwich. The place was really clean (Kris even replaced our towels during our short stay) and they had nicely set aside cutlery, plates and cups for us to use, as well as some free space in the fridge. The room has a nice view towards Canary Wharf.
The communication was excellent both before arrival and during the stay.
Keep in mind that there is no door for the room (only the stairs) and that you have to walk uphill a bit to get to the house. Both these things are described in the listing.
All in all we had a great time, and would definitely recommend this place!