I recently stayed at Eirini + Mo's place with my two boys (11 and 7) and we had a great stay. The flat itself was very clean and well equipped with everything we needed (especially a kitchen and laundry). The photos are a true representation of the unit. The kids enjoyed the bunk bed. The surrounding neighbourhood is great; great public transit options nearby with easy access to central London, grocery stores, shops and restaurants.
I would not hesitate to stay here again when in London. The great reviews you read here are here for a reason!