Excellent location if you also need to rest and to be in a calm neighborhood. Great public transport links(buses every 5-8minutes) to the nearest tube stop. There are several shops nearby, including a supermaket (Tesco Express) open everyday from 6am to midnight.
The room is perfectly clean and comfortable. You have space and freedom to organize your things. The bathroom is also very clean and the kitchen organized. Overall I felt home and very relaxed.
James is a great guy and will make sure you're comfortable.
His house is a great spot for the perfect London holidays, don't miss it!