This is a beautiful house, with a warm, welcoming and intelligent host - it is a small double as advertised and you must share a (beautiful!) bathroom, but it is a rare example of a room being nicer in reality than in the photo! The view is over a lovely garden, there is plenty of room to hang clothes, a tea tray and a desk - everything you need for a short stay. Plus, there is a small space for you to park your car, presuming your car is a sensible size (my little Fiesta fitted in easily).
In terms of location, this depends on where you need to be, but Wanstead is always a place I have enjoyed (I used to live in Leytonstone many years ago) with a village feel, plenty of eating and drinking options, wide pavements, plenty of green spaces, a tube station (two if you include nearby Snaresbrook) and lots of buses. I needed to go to the City of London crematorium, and that is a 45 minute walk, and a really pleasant one, across Wanstead Flats - later I needed to go up to Chingford, which was a simple bus ride. If you needed to be in central London, that is very easy by tube on the Central Line.