Had a great stay at Stephen's, he's a really likeable character with a great sense of humour and always open to interesting conversations. My stay was fairly short (3 nights), so unfortunately did not have the chance to interact with him all too much, but I can tell that you can have a great time with him on a longer stay. If you prefer to stay to yourself, he respects that, too.
The room provided was very cozy and could sleep great there. All necessities are covered, there is also a kitchen with everything you might need. There are several bus lines in the immediate proximity operating 24/7 which can get you in a few minutes to Morden Station from which you can reach anywhere in London via the tube.
All in all highly recommended!