The house is located about 5-7minutes walk from Wanstead Underground station (Central line). It's a safe area for a solo female traveler to walk at night.
Jean is very friendly!! Bed is very comfortable. However, room does not come with a lock (if a lock is important to you).
No standing shower facility at the bathroom, which is difficult for me to wash my hair. : )
Just for your information, as it's located at Zone 4, one must get an Oyster card but if your traveling area is mainly Zone 1 & Zone 2 tourist attractions, I don't think it's necessary to get a Zone 1-4 travel card as it might not be any saving. That's is my opinion as I did bought a 7 days Travel card. : (
Overall, if you are on a tight budget and don't mind the commute time to city centre, I do recommend Jean's place.