I was only at the house for a few hours to sleep. Everything was incredibly smooth and easy. The booking followed by the details on getting to Heathrow, the details on how to enter the property, so easy and painless.
The room was basic and the radiators weren't on at all. I was sent settings on how to adjust the heat but not to actually turn it on. So the bedroom and ensuite were cold. Also the water pressure in the shower was abysmal. I stayed in room 6.
it was definitely worth it in terms of distance to terminal 2 and 3, there is a free bus service run by TFL, or you can get one of the many available Ubers or Lyfts.