We have just spent 4 nights at Nav's place (2 adults and 2 children, aged 13 and 10) and had a fantastic time. Nav met us at Paddington Station after our long haul flight to help with our luggage. It was an easy 5 minute walk to the flat. The flat was lovely, in a heritage building, very clean, comfortably furnished and Nav had gone the extra mile providing milk, bread and a few other goodies which was so nice after our long journey. She even ordered a SIM card so we could get our phone up and running.
The beds were comfortable, the kitchen had everything we needed, the apartment was well located, close to a couple of tube stations and walking distance to the museums and Oxford St. It was in a nice area, close to restaurants and shops, yet quiet, and it gave us the London experience we were wanting.
Nav emailed lots of maps and helpful information about the area, plus there was an information folder in the flat and some London info. Part way through our stay, she text me to ask if there was anything we needed, then dropped off the required dishwasher powder and some more treats!!
All in all a fantastic first experience of Airbnb and I hope that the rest of our trip goes this well.