Sam and Andrea were great hosts. I had an issue with theft on the tube and they were absolutely accomodating to what i needed.
Their entire home was very clean and the bed was very comfortable. Directions to their home were very easy to follow.
In terms of communication, i found that it was easier to talk to them in person rather than through airbnb, most likely because they have to work. They definitely get back to you eventually though.
Overall, i would absolutely recommend Sam and Andrea's home to anybody visitimg London.