The location of the apartment is great and it is spacious. The balcony is a great bonus and amenity. Like all recently built apartments in London it is well insulated and as it does not have air conditioning, it can get very very warm during the summer - something to be aware of.
You should also be aware you will be dealing with a third party management company rather than the host themselves. At times I found this very frustrating when trying to resolve some issues we encountered.