Willems flat is really beautiful and exactly as shown in the pictures. The location is perfect for a stay in London as it is only a 30 minutes drive with the train. Right next to the flat you have a shopping mall with everything you need.
And the garden! It is really stunning, well maintained and the perfect spot to relax after you explored the city. Harrow (on the hill) itself is also a beautiful place.
The only small negative fact is that the flat is not that well insulated so often you hear the footsteps and movements of the people from the flat above.
You won’t regret it, so book the flat right away! It is a gem ;)