This is a really great place to stay. Private, quiet, secure and very comfortable (not to mention stylish!), with easy access to shops (very good regional shopping centre, plus heaps of local stores), street market and public transport. The apartment has everything you could need: queen-size (king-size?) bed, large bathroom, washing machine, lovely kitchen and living area, and cosy warm.
Although the apartment is a little bit out of the centre of London, the underground station is just a 5 min walk away and so London's sights are within easy reach. We went to a West End show in Piccadilly, plus Bond Street, Covent Garden and Charing Cross and the Embankment all in one weekend - if you are mobile, then it's not a problem at all. The direct train from Lewisham to Victoria also made our departure from Gatwick Airport a breeze - no stairs to climb or underground to navigate with heavy cases! We would thoroughly recommend Heather's place and will certainly be hoping to book there again (we regularly visit London).
We didn't actually get to meet Heather, but from all our interactions with her, she seems very friendly and helpful.
All in all, this is the best Airbnb we have so far experienced in London (out of three).
Thanks again, Heather. We had a great time! :)