Great location for the price with Marble Arch tube less than 10 minutes from the property and Hyde Park a stones throw.
Location of Property (Google Maps)
https://www.google.co.uk/maps/place/46+Kendal+St,+St+George's+Fields,+London+W2+2BU/@51.5145005,-0.1661522,18.5z/data=!4m5!3m4!1s0x4876054ab5767d5d:0x8aad5fb04c75e40e!8m2!3d51.5149002!4d-0.1657088
For breakfast, I would recommend La Pain Quotidien. From the flat turn left and walk up Kendal St. On the other side you'll see the café, on the corner.