Geoff's place was a great pick! I and four of my classmates stayed in this flat for four months while we completed part of our Master's degree, and it was perfect for us. The flat is well-located: you can easily walk to the Victoria/Westminster area (Parliament, Westminster Abbey, etc.) in about 20 minutes, the same for Waterloo/Thames embankment. The flat is a 10 minute walk from both Kennington Tube and Vauxhall Tube/national rail station, and surrounded by bus stops, so it is easy to access the city center, airports, etc. from public transport as well.
There are multiple small supermarkets around, as well as a large supermarket about 5 minutes' walk away. Lots of lovely pubs around too, but it is also a residential area so a good place to find a bit of peace and quiet in the evening. Geoff and his friend Erin were wonderful hosts; Erin greeted us for checkin and both were available to answer questions quite quickly. There is also a lovely neighbor couple who often received our packages and were available for any help we should need.
This is a true home, with four full bedrooms, two bathrooms, and a full kitchen and living area as well as a lovely patio! The flat was clean and neat upon arrival, and Geoff offered us both a cleaning service and cleaning supplies, and even stocked the kitchen with some basic food items for our arrival. We loved having this as our semester home and would recommend to anyone who is in London looking to explore the sights or stay more long-term (great value for a long-term stay)! For a long-term stay, it easily and comfortably fits four people; for a short-term stay you could share bedrooms and fit more.