I stayed at Gillian's place for six nights and it was great! Really clean and comfortable and quiet, and Gillian and her husband are so friendly.
The Warwick Avenue tube station is a short walk away, and Little Venice is not much further. I warmly recommend a narrowboat tour on the Regent's Canal by Jason's Canal Boat Trip. It takes 45 minutes to Camden Market and is really interesting!
The Bakerloo line tube is very convenient, not too crowded and it goes to Oxford Circus and Piccadilly Circus via Baker Street and Regent's Park. I used it to go all the way to Elephant&Castle to go to the Museum of Cinema.