Overall, its good stay !
The owner is very helpful and she will respond to the queries very positively.
1) From inside, the apartment looks little old ... and no regular building maintenance I guess.
2) Just a suggestion - it would be helpful if they put some instructions for Gas !
I was little confused and checking for the lighter (to flame) but somehow, I've managed ... otherwise if the owner includes in the check-in instructions then that would be great. I know its not that much important ... in Europe, I have experienced electric stoves most of the places/countries.
3) Frankly speaking, I don't have any complaints to report here - however, I've paid 155 euros/135 pounds for 3 nights somewhere I am getting the feeling like it's little expensive ... if it comes around 120 euros/100 pounds (single room) then I think that would be reasonable. Just to refer, comparing with 'Airbnb stay(s) in Vienna, Austria' and other EU countries.
I agree that London is little expensive place to live