I have spent a marvellous time at Harry's. The place is well located, conveniently close to Central Line. It is close to main road, but as far as you keep the window closed, no noise at all.
If you like deep toasted bread or if you are going to use the oven, make sure the door of the kitchen is closed, because the smoke detector truly works and will complain.
The area is mainly residential, it has the usual neighbour shops at ~10mins walk, and no night life.
Overall, highly recommended if you want a place of your own.