We (two adults, two kids 2+4y.o.) travelled to London for a three-day stay ahead of a friend's wedding. We chose this appartment because we wanted to stay out of the busy, bustling city atmosphere but still conveniently close enough to reach the museums in South Kensington and go for some quick shopping at Oxford/Regent's street. The location is indeed everything we hoped for, attractive eateries and grocery stores nearby and with the busses we could comfortably reach any destination we wanted. Also, it is just a 10min walk to Portobello Market and Hyde Park.
The appartment had everything we needed, and was exactly as described. The bed was very comfortable. The sofa bed was fine for the kids, however, it gave us adults a back ache as we could feel every spring. If the sofa bed is in use, the space is a bit cramped around the sitting/dining room area. The kitchen was well-equipped for dinners in.
The owners, Billie and Max, were always very quick to respond and easy to communicate with. All in all, we really enjoyed our stay and do recommend this appartment for families and couples.