My stay at Gillian's has been more than perfect.
The room is super cosy, you really have your privacy (private bathroom + small fridge in the room). You also have access to "your own patio".
Gillian and her husband are two very friendly persons, they are there to talk to you if you want but they also know when you just want to be alone. They even cooked breakfast and they're delicious !
I would definitely go back to her place for my next London trip.