We stayed at Andrew's flat as part of our journey in the UK this summer. The space itself is very clean, open, and tastefully decorated. The large room with the couch, TV, and kitchen was a great gathering point for our family, and the large windows provided a welcome cool breeze during an unusually warm few days in London. We traveled with our three children (ages 3 to 8), so we ended up using all three beds, including the pull-out sofa bed. Everyone slept well, and we did not notice any road noise or noise from other apartments.
The location of this flat was a key feature when we went looking for a place to stay, as we had to catch a train to Devon after our stay, and the GWR train departs from Paddington. We made our way easily around the city in the days before we left, as well. I highly recommend Andrew's flat for families for it's cleanliness, comfort, and location.