Stayed here with my family of 6 (incl 4 children) and had a wonderful time. It is a 3 story home with 2 bedrooms on each floor. They were kind enough to provide us 2 travel cots as we had 2 children under the age of 2. The home was very warm and had everything you need, including a clothes washer AND dryer. Very modern decor and well stocked bathrooms. Loved the heated towel bars. It's about a 10 minute walk to the Kingston train which you can use to get into central London in about 45 minutes, again all very easy. Grocery store is near train station as well as the downtown area. There is a nice restaurant about 3 minutes walk from the flat. Parking in driveway was very nice and the neighborhood is very quiet.
Bonus: My wife actually left her wedding rings in the flat when we departed. We noticed at Heathrow as we were checking in and didn't have time to return. The management company has been responsive, located our rings, and is helping get them back to us in the USA!