We stayed here with our 3 kids for almost a week, we all loved the place. We spent quite a long time looking for a good location to tour Washington DC, and without a doubt this is the ideal place (Check out the ramen place next door as well, it's a bonus)
As for the apartment it's all we could hope for and more, it's a premium place, decorated with style and quality. All you need in the kitchen and bathrooms and very comfortable beds as well as the sofa bed in the living room.
We had a great time here and highly recommend it for families or 2 couples.