Host
Viv is everything you could hope for in a host. She's warm, hospitable, and flexible. If you want to chat over a cup of tea, stay in your room and study, or leave early and return late, she will make sure to accommodate you. Depending on your schedule she will cook breakfast for you.
Space
A comfortable room with a very comfortable bed. The entire home is immaculately clean. There are towels and bathrobes available as well as toiletries, but the options are limited if you are a guy.
Location
Viv's place is not in Central London. It's about a 30 minute train ride away. The good thing is that the station is only a 5-10 minute walk and from there it's a straight shot into the city. The neighborhood is super quiet and peaceful. A 10 minute walk in either direction brings you to many pubs and a variety of restaurant choices.
Bottom line
If you're visiting London, are traveling solo or as a couple, and Viv's place is available, don't overthink it. Just book her place and enjoy your trip.