It was really easy and very simple to find the flat. Alessandro give all the details with a map ans you can ask him questions.
I stayed 2 nights in a studio in the 4th floor with a nice view on the left of the London Eye and the Big Ben. When I arrived, the keys where in a locker with a code and when I was in the studio there were a bottle of wine, drinks in the fridge, cereals, tea and coffee for the morning, very nice! And a map and a plug in the table to help you.
The studio was cosy with 2 toilets outside the room but share with just one person, so it was clean.
The subway station near is Victoria, 7-8min by walk.
It was a very Nice weekend, I was very comfortable.