My wife and I stayed a month in a quiet small room in the Shaperd Bush area.
It is near a convenient local Sainsbury. You can buy stuff there. But the main road is occupied by immigrants and you need to go somewhere else if you want to feel original British.
The room is cosy. If you want to stay longer than a week, I recommend not staying here. Because this room has no Kitchen and you will find that the price of eating out is way more expensive than cutting the cost of accommodation.
Anyway, the host is very kind and took warm care of us. The room has a microwave, capsule coffee machine, small refrigerator and electric kettle. Everything works fine but the electric kettle is a bit old and dirty. The best thing I should tell is that you can feel using the entire house. I encountered nobody during our stay.
The Bush station and Bush Market station are like 10-15 minutes away. I recommend bus 94 for Hyde Park and Soho. And working and having a coffee in the Bush theatre was cool.