I really loved staying with Piroska. The flat, the room, the district all fit the provided description, the abbey ruins and the forest are there as promised. The general atmosphere is amazing, very relaxed and peaceful. I had enough privacy, yet enjoyed some nice talks with Piroska. She also gave me advice on what to see both in London and around Abbey Wood, though I did not have enough time to explore it all.
Shops, buses, trains are easily accessible, travelling to London centre outside of rush hours is just a pleasure — so this option will definitely fit tourists! Don't be scared of zone 4, the train is better than the tube :)
I would definitely stay with Piroska again.