Kristina's place was great and she was a great host. The location is a bit further away from the tube stop (Victoria Station), about 10 min walk, but still very convenient. (It might have felt longer since it was rainy and cold when we were there, but I imagine it would be a very comfortable walk in nice weather). Her place is in a quieter neighborhood, which was nice. This place is also walkable to Buckingham Palace and sights nearby!