Plenty of others posted rave reviews for the host and her place, and I agree. This is a great place to stay in London. Everything, even a computer with printer and paper, is provided. Rather than duplicate all the good reviews, I'll just list a few things that could have been a bit better.
* No couch and table - There is no comfortable place to sit and unwind after a long day of sight seeing in London.
* Window covering is translucent, which lets in all the lights. While this keeps the room bright, there is no sleeping in late in the morning.
* Ran out of hot water the first day. After a long flight and a day of walking around in London, my wife took a bit of an extended shower, which meant the water started turning cold when I hopped in for a shower. No issues with hot water after that when taking normal length showers.
* Needs to be better insulated, which just may be how the London flats are made. It took a while to heat up the room because all the walls were so cold.
* No TV, which didn't bother me, but other travelers may want one.