I stayed in this flat for 4 nights with 5 other people. It was large enough to easily accommodate all of us. The two bedrooms offered plenty of space, the beds were comfortable (possibly queen-sized), and we enjoyed having an ensuite bathroom for additional privacy and convenience. In addition, the couch in the living room converts into a pullout mattress for extra sleeping space (enough space for two). The neighborhood is clean, safe, and easily walkable to the West Brompton tube station. The wifi is a little slow (especially in the bedrooms), but it's workable.
We loved staying in this flat. Alex (the property manager) was very nice and helpful. I would absolutely re-book this flat again, in the future, with no hesitation.