Matt's place is very spacious. We were 4 adults and 2 young children (2 years and ½). Beds are very comfortable and quite big (they fit 2 adults and 1 child). The flat was clean; the kitchen was very well equipped – great coffee machine! – and the bathroom was also new with modern utilities.
It is situated in a quiet area – no traffic!
The living room has a big TV screen with a large variety of channels. There is another TV in one of the bedrooms.
Matt is a very well organised person – he explained everything in details before our arrival. He is a great host. He welcomed us the first evening when we arrived quite late (around 8 p.m.). There were a bottle of wine and some chocolates for us in the kitchen – we really appreciated the nice gesture.
In terms of commuting to the city centre, the place is rather far, however bus no. 3 is just across the street and takes you right into the centre (Oxford Circus) in about an hour. There is no tube station nearby but if you are coming to London by international train to King's Cross Saint Pancras, take the tube, Victoria line, to Brixton and from there bus no. 3 to Gipsy Hill. Cheaper and faster than a taxi. Oyster cards are really very handy!
All in all, Matt's place was a nice experience and we would definitely recommend his flat.