It was an absolute pleasure staying in Roberta's amazing apartment for an entire month. The place is spacious, very clean and nicely decorated. I stayed with a friend of mine and it really felt like our home for the time being. There's a big kitchen with all amenities you'll need and a great large bathroom with big white fluffy towels. Roberta left clear instructions and was always available to anwser any of our questions. We loved the neighborhood as well - the apartment is located on a quiet side street of a big street filled with nice cafe's and restaurants and they even have a backyard where you can enjoy the sun almost the entire day.
I would definitely recommend staying in Roberta's apartment if you're visiting London.