Lydia's place is compact and very comfortable. I was particularly grateful to have access to cooking and clothes-washing facilities, which you rarely get at this price on Air BnB. It's also amazingly quiet for somewhere so close to several main roads, and two branch train stations. It was the ideal place to return to in the evenings.
You have easy access to Paddington and Waterloo from Putney East and Putney Station, respectively. There are also quite a few big supermarkets and pharmacies within five minutes' walk, if, like me, you're travelling light and need to stock up during the stay. Lydia herself is lovely and was very forgiving when I turned up on the right street but the wrong door.
A word on accessibility: the flat is stair-access only and the stairwell is quite narrow. It won't suit someone with mobility issues, or with lots of luggage. Nevertheless this is still a bargain in a very nice area.