I had a great stay in Jenny's room. It's exactly as described: very clean, cosy and so central! I loved being able to walk to all the great shops, restaurants and theaters in the neighbourhood, and the best dim sum is just around the corner :-)
The room is at the back of the building, so no street noise, but you can always hear a ventilation system on the roof outside. It's not very loud and it certainly didn't keep me awake, but keep it in mind.
Anyway, I will definitely book Jenny's place again next time I'm in London!