We've stayed in dozens of airbnb's around the world over the years, and this flat was by far the nicest we've ever experienced. It is simply gorgeous. The owners were helpful and it was so easy to locate and access. Plus, it's location is excellent - tucked away and quiet across the street from a park (Lincoln's Inn Fields), yet a mere 2 minutes walk to the closest tube station (Holborn), a minute to coffee shops and restaurants, and less then 5 minutes walk over to Covent Garden, The British Museum, etc. So centrally located, yet quiet and calm and beautiful.
Having full laundry (including a clothes dryer) was excellent and helpful. The only issue for us was in the evenings we noticed that the wifi would be extremely slow. If this is crucial to you, I would check in with the owners on the wifi status but this would not stop me from returning back in an instant!