Rachel's place was very nice indeed. Five floors up are no doubt a trek but doable. There is a great draft in the place from the windows and the bed is very comfortable. The area is fantastic and easily accessible via the tube. I would highly recommend staying there for pleasure. Rachel was available to answer questions and easy to meet to get the keys and such.
The WiFi is run through the entire building and not per unit, so thus it is very weak, if non existent in some areas of the flat. If you are looking to work from the flat using the WiFi I would suggest getting a hot spot.