My stay with Elitsa was great!
The neighbourhood is clean and quiet, even though it is in the middle of South London. You can get everywhere you want fast by taking the bus from Nelson's Row/Clapham Common or taking the tube form Clapham Common (Northern Line). Even when it was dark, I didn't had the feeling not to be safe outside.
Elitsa and her brother were really nice and friendly. The greeted me when I arrived there and I had a few chats with Elitsa. She told me about herself, asked questions about me and gave some recommendations for great places in the city.
The room and also the rest of the flat are really tidy! The bed was very comfortable and I slept very well. I could use the kitchen with the oven and fridge, could have a shower whenever I wanted and could come and go anytime.
The Sainsbury's just around the corner turned out to be very convenient and it has a wide range of food and other stuff.
I would totally recommend staying with Elitsa. I will definitely do so again next time I'm in London.