I'll leave here my opinion to Marco.
Marco was always available to answer all my questions.
The apartment is fine.
In my opinion, it is the ideal place for a couple or a couple with one child.
The person that makes the check-in should test together with the clients all the equipment since it is not fair to discover that there are things that don’t work after its departure. When in holidays, we don’t want to spend time claiming about equipment that does not work and asking for someone to go there to solve the situation. It was our case, we didn’t claim and ask for someone to go there and solve the things that were not ok. …. (We took this lesson, always test the equipment).
To finalize, the apartment is very well located and clean.
If one day, we visit again London without our children, maybe we’ll stay at this same apartment.