I'd definitely recommend this place, for several reasons. Sam immediately made me feel very welcome and at home as soon as I arrived and gave me lots of information about the area, transport, shops etc (it's very close to both Wimbledon and Clapham junction with lots of trains going straight to Waterloo) - if you have any questions, he'll be happy to help you.
All areas (bathroom, communal area, bedroom) were clean and tidy and the people in the house were very friendly, but at the same time you can be as private as you want and I thought the locks on the doors gave a professional impression.
I felt really comfortable here and would definitely return. Thanks Sam!