The "clean" in the description of Betty's place was what made it stand out for me, and it is in fact very clean, which I always appreciate. The bed is big and comfortable and Betty is friendly and helpful.
If I had to say anything negative about this place it would be that it can be noisy late at night and early in the morning because of the overground and it is a little bit far from the closest underground station.
The stay was as I expected it to be and the place is good value. Perfect for a one night stay.