We had quite a long stay at Cristina's place, 11 days, and that gives me peace of mind in writing this review.
The place is great: clean, new, comfy, spacious, the pictures are very much the truth.
Cristina and Stefano are wonderful people, we had problems with our luggage and they were very kind in offering and actually borrowing us some clothes. We felt at home from the very beginning. Also, they were very helpful with advice for transport, food, leisure, etc. And just as they say, if you want to be quiet, fine - and if you wanna talk, just as fine for them. They are very good in giving you privacy or offering you some tea for a nice conversation.
The location is great, if you are those kind of people that only believe in the tube (like I was) - give it a chance. There are 2 train stations very close to their place, and travelling around London in those trains are, believe me, waaaaay better than the tube.
Therefore, if you have the chance - GO FOR IT!