I had a really nice stay at Kamil's place. Kamil is a good communicator who made me feel comfortable during my 2 weeks stay and provided everything I needed. Although I was outside most of the day for work, we had several nice chats on evenings.
The house is located in a nice and calm area, 6 min from Leytonstone station (Central Line) - which is very convenient to go to Central London.
One minor downside would be the mattress which was a little too firm in my opinion.