Perfect in every regard! Fiona and Tristan are generous and thoughtful hosts--the best of the best, truly.
The location is excellent--easily walkable to many locations and so conveniently located to the tube and overground.
The "private room" is a completely private flat perfectly sized for a couple. It is quiet inside despite the lively location. It stayed cool during the days with the fans (it was in the 80s during the visit). It has everything you could need to be comfortable--firm bed, nice shower, a washer and dryer (a real dryer--this is a HUGE bonus), a fully equipped kitchen for cooking including a drip coffee maker with ground coffee (huge perk to this American :), and it is well stocked from hearty breakfast offerings to get you going courtesy of the hosts, to the cleaning supplies should you need something. No detail is overlooked.
From the beginning even before check in, communication is brilliant. Fiona provides detailed directions on how to check in complete with pictures. She has a notebook that has great directions for local places, as well as providing directions for how to use the appliances (it's amazing to me how often this is overlooked where I have stayed and it can be frustrating trying to look up online washing machine directions or thermostat directions for a different country).
I highly recommend Fiona and Tristan's place!