Belva gave me great directions to reach her flat from Shepherd's Bush station (which is significantly closer than Hammersmith). There are plenty of grocery stores and a market to get food nearby, but I didn't find any good places to have breakfast. The flat itself is on the small side, with two occupied bedrooms and the guest bedroom and then a bathroom and narrow kitchen. My bedroom itself was nice, with an attractive and comfortable bed and a desk, and the wi-fi worked well. However, it wasn't yet ready when I arrived, and since I was in a rush to meet friends, I had to leave my luggage in another bedroom at first (plus I accidentally picked up two sets of keys, which I felt really bad about afterwards). I did not get to meet Belva during my stay because our hours didn't overlap much and she was preparing my room when I arrived, but she was very responsive via email.

I would say that this is a nice deal if you just want a "cheap and cheerful" place to stay that is convenient to the central line and offers privacy and quiet. However, if you want a lot of interaction with your host(s) as you share their home, this may not be the place for you.