Esther's house is in a good location in north London, with convenient access to transport links to both airport (Stansted from Tottenham Hale station a few mins walk away) and central London (Victoria line from a choice of 2 tube stations nearby). The tube runs underneath the house, and while this didn't bother me at all, it may not be so for all guests.
I found the house very cold, even though the heating appeared to be working, and I needed to buy extra clothes to sleep in while I was there. (This is where the large generic retail park nearby, which otherwise is a bit of an eyesore, came in handy!)
The bathroom is not massively private, and there is no shower as such, just a shower connection on the bath and a shower curtain. (But nowhere to hang the shower head.)
I didn't see much of Esther as I wasn't around much, but she seemed very nice. Based on the decor, I'm guessing she likes purple a lot :)
All in all, OK for a brief visit to London for 2 nights, but I don't think I would book it again I'm afraid.