My friends and I (3 of us) stayed at Whitney's place for a week. The room had a double bed and a single bed and towels were provided. The toilet on the same floor was only used by us so it is somewhat private.
Whitney and her partner were very friendly and accommodating and even picked us up from Brockley station. As we were carrying heavy luggage, Kay also helped us to carry the luggages up to the second floor (there was no lift). Whitney also informed us beforehand that there was an underground strike and provided us clear instructions on the best way to get to her place without underground services.
Only one thing to note is that the streets are pretty empty at night and there are bars nearby so it might be good to plan to arrive back earlier.
All in all a good stay!