My only complaint as someone who didn't know London at all (it was my first time there), was that I didn't realize how far away from everything it was. It's not even very close to an Underground stop.
Also, her TV went out during the world cup final. I had to run a mile in the rain to catch the end of it at the nearest pub.
But, it was very comfortable and definitely as she advertised it amenities/comfort-wise. I slept very well and had no complaints about the accomadation itself!