It is a rather basic property with little utensils in the kitchen, nor decoration in the house so very little atmosphere. But convenient location near Marble Arch, clean enough and communicating host. You'd have to be willing to climb 6 stairs up to the top floor.
We unfortunately had some issues with a broken boiler and lack of shower/heating. But was generally handled well by Sem, even while he was on holiday. And eventually got a big part of our rent refunded.
Overall I could recommend this place as a London stay.