I stayed with Gene for 2 months (was in London for a short course) and it was great. Gene is very friendly and will try to make things perfect for you. Gene lives in the house as well so you can let her know of any problems and issues as you encounter them. The place is her home too so you can expect the kind of care she takes to maintain it. Accessibility is good considering this is not a central London location. There are buses going to the city (40 mins) and the nearest underground station is 10 mins away by bus. Walking from the place to bus station takes around 7 mins.
The neighbourhood is a quite and also a safe one in my opinion. The high street is 10 mins away by walk where you can find groceries, banks, etc. I enjoyed meeting different people from around the globe during my stay.