Our overall experience with our stay at Ash's place was good. I wouldn't say the house is exceptionally charming, but it does have all the comfort you need. We stayed for three nights with four adults (2 on the sofabed, 2 in the main bedroom) and 2 babies (in the single person bedroom). Ash was very helpful and flexible. Balham is a residential neigbourhood, but public transport is nearby and gets you in about 40 min to the city center.